Food and Nutritional Requirements for Dogs

Food and Nutritional Requirements for Dogs INTRODUCTION Domestic dogs (Canis familiaris) are the most popular pet species in Britain, excluding fish (PFMA, 2014), and as such there are a wide variety of stakeholders in dog welfare, ranging from the owner and veterinarian to insurance companies and animal welfare charities (Buckland et al., 2013). The pet food business is a multi-million pound industry which aims to produce adequate foodstuffs for pets in terms of nutritional content, but also aims to turn a profit as in any other trade (Thompson, 2008; FEDIAF, 2012). As such, the nutritional quality of pet food varies between brands and the usage of non-meat sources of protein has been questioned (Hilton, 1987). This paper aims to highlight the carnivorous origins of domestic dogs, review their major protein, vitamin and mineral requirements including some of the issues pertaining to inadequate pet food nutrition and develop a conclusion to the hypothesis: dogs can survive on a ‘vegetarian’ diet. TAXONOMY AND EVOLUTION All dogs, Family Canidae, are members of the Order Carnivora and possess the enlarged carnassial teeth associated with the carnivorous diet characteristic of this taxon (Wang et al., 2004). Carnivora is split into two suborders: Feliformia, which includes felids, and Caniformia which includes canids. The Suborder Caniformia is then further divided into two sister subfamilies: Cynoidea, which includes Canidae, and Arctoidea which includes the Mustelidae, Procyonidae, Ursidae and Pinnepedia. Canidae is reported to be the earliest diverging family of the Caniformia, approximately nine million years ago (Wayne O’Brien, 1987) and currently hosts 34 extant species of wolf, dog and fox. Domestication of dogs has been traced back approximately 15,000 years, with the earliest known C. familiaris fossil dating back 14,000 years (Sablin Khlopachev, 2002). The grey wolf (Canis lupus) was almost certainly the precursor species of the domestic dog, based on mitochondrial DNA sequencing (Garcia-Moreno et al., 1996). Studies on grey wolf diet have shown it to be a primary carnivore which is highly adaptable to variations in prey, whereas domestic dogs have a much wider tolerance of different food types, facilitated by the adaptation of three genes involved in starch metabolism (Axelsson et al., 2013). Distinctive breeds appear to have diverged approximately 3000-4000 years ago (Harcourt, 1974; Clutton-Brock, 1984), with the greyhound being one of the most ancient breeds, however modern domestic dogs are known to exhibit similar foraging behaviours to their wild ancestors (Bradshaw, 2006). The variation in size and therefore energy requirements of breeds within dogs is the largest of any mammalian species (Lauten, 2006). Therefore pet food must accommodate not only differences in breed and size, but also other factors such as age, activity, reproductive status, environment and health (FEDIAF, 2013). PHYSIOLOGY Cats are described as obligate carnivores because protein is metabolised for energy as well as functioning in structural and synthetic processes (Zoran, 2002). In contrast, dogs can survive on an omnivorous diet by adjusting the catabolism of protein within the body when fed a low-protein diet, and can metabolise glucose from higher concentrations of carbohydrate thereby reducing the need for proteinaceous energy (Zoran, 2002). Dogs are unable to synthesise ten essential amino acids which are required for the synthesis of protein within the body for structural and metabolic processes (Lotspeich, 1949). Therefore protein is in essential component of the diet, providing a vital source of essential amino acids. NUTRITIONAL REQUIREMENTS For adult dogs, the minimum recommended level of protein within dry matter food is 18g/100gDM. For pregnancy and early growth stages, i.e. puppies under 14 weeks old, this requirement is increased to 25g/100gDM. Above 14 weeks old, but still before adulthood, a minimum of 20g/100gDM is recommended (FEDIAF, 2013). With every 1%DM increase in protein, an extra 0.01g of arginine is recommended (NRC, 2006). Pet food manufacturers are required to meet these minimum recommended amounts of dietary nutrition for the target consumer animal they are producing for (FEDIAF, 2013); this means that owners have peace of mind when choosing a diet for their dog, knowing that it is nutritionally balanced. However, constituents of pet food must meet optimal criteria for nutrition, palatability, digestibility and be economical (Thompson, 2008). If a food is too expensive, owners are likely to resort to a lower cost food or feed their dog upon scraps which increases the risk of an unbalanced diet and imp roper nutrition (Coffee et al., 1980). Table 1: Popular and premium dog food constituent comparisons. Prices with a sourced from Tesco (2015) or b from Petplanet (2015), dashes indicate no data. Dog Food Brand Dry/Wet Crude Protein (%) Fat (%) Crude Ash (%) Fibre (%) Moisture (%) Cost ( £/kg) Source Bakers Complete Tasty Beef Dry 21.0 10.0 8.0 2.5 2.66a Bakers (2015) Ceser Can with Chicken and Turkey Wet 9.0 5.0 0.3 83.0 3.73a Tesco (2015) Hi Life Feed Me with Turkey and Chicken Dry 21.0 7.0 3.0 21.0 2.50a Tesco (2015) Iams ProActive Health Adult Small Medium Breed Dry 26.0 15.0 7.4 3.0 8.0 2.50a Iams (2015) James Wellbeloved Adult Fish and Rice Dry 21.5 10.5 7.3 3.1 2.79b James Wellbeloved (2015) James Wellbeloved Adult Turkey and Rice Wet 6.5 4.0 1.5 0.5 81.0 4.66b Pedigree Complete Adult with Chicken Dry 21.0 13.0 3.0 12.0 2.50a Pedigree (2015) Pedigree Complete Puppy Nutrition Chicken and Rice Dry 28.0 16.0 2.5 12.0 2.33a Pedigree with Beef In Gravy Wet 7.0 5.5 0.5 81.0 1.50a Royal Canin Giant Adult Dry 28.0 20.0 5.2 1.8 8.0 2.93b Royal Canin (2014) Royal Canin Medium Adult Dry 25.0 14.0 5.9 1.2 9.5 2.93b Royal Canin X-Small Adult Dry 24.0 18.0 5.7 1.7 9.5 5.66b Tesco Everyday Value Beef Chunks in Gravy Wet 6.5 4.0 2.0 0.5 81.5 0.81a Tesco (2015) Tesco Everyday Value Complete Dog Food Dry 21.0 8.5 3.0 0.59a Wafcol Vegetarian Dog Food Dry 20.0 5.0 7.0 6.0 1.73b Petplanet (2015) DOG FOOD CONSTITUENTS Complete dog foods are those which are nutritionally balanced and suitable to be fed daily (FEDIAF, 2013). They meet the minimum FEDIAF standards and do not exceed maximal recommendations where stated (e.g. lysine during growth), although differences in protein, fat and carbohydrate ratios are seen among brands with cost typically increasing with protein content (Thompson, 2008), as described in table 1. Traditional dog foods use meat protein sourced from cuts of meat, viscera or meat meal and may be packaged in cans or within cereal based dry kibble which is treated with meat flavours to improve palatability (McGrane, 2006). Extrusion is a technique used in the production of about 95% of dry pet foods in order to improve the palatability and utilisation of protein through heat treatment (Bednar et al., 2000; Tran et al., 2008). Processing of soybeans is carried out to remove toxins such as lectin and protease inhibitors but also destroys the naturally high concentrations of B vitamins such a thiamine (Gregory, 1985; Hilton, 1987; LebiedziÅ„ska Szefer, 2006). Dietary protein may come from either animal or vegetable sources (NRC, 2006), with a huge increase in the usage of soybean products (ground soybeans, soy flour, soy hulls, soybean oil and concentrate) reducing production costs of pet food and facilitating the anthropomorphic ‘vegetarian’ diet which some owners are feeding their pets (McGrane, 2006). However, Kienzle Engelhard (2001) found that only two of the twelve commercially available foods investigated in their European study provided adequate nutrition according to recommendations set out by AAFCO, mainly on the basis of protein concentration. As shown in table 1, the vegetarian food had the lowest percentage of protein, and it has been suggested that the vegetable products those diets are made up of may not contain the correct balance of amino acids neccessary for a healthy dog (Coffee et al., 1980; Hilton, 1987). For example, arginine, which is required for optimal growth in young dogs and plays an intermediate role in the urea cycle (Burns et al., 1981; FEDIAF, 2013), cystine and methionine, both implemental in coat condition, are all naturally abundant in animal tissue (Wu Morris, 1998). The levels and source of dietary protein and the form it is delivered in can have significant effects on the health of a dog. For example, diets low in protein can cause hypoproteinemia (a low concentration of albumin and total protein in the blood) leading to edema (Weech et al., 1935) or pancreatitis in high-fat, low-protein diets (Lindsay et al., 1948). Zhao et al. (1997) demonstrated that assimilation of protein into the gut is limited by digestibility, which in turn is affected by the form of protein with a food. If the source of protein available within the food is intact, around 40% remains undigested but available within the ileum four hours after a meal. In comparison, hydrolysed proteins (those which have been broken down into constituent amino acids) have an absorption rate of over 70% within an hour in humans (Chung et al., 1979). EFFECTS OF A VEGETARIAN DIET Diets reduced in meat and fish are most often fed to dogs due to owner preference as opposed to health reasons; in studies recruiting pets fed vegetarian diets all owners report being vegetarian themselves (Kienzle Engelhard, 2001; Michel, 2006; Rothgerber, 2014). The reported effects of a vegetable-based diet for dogs are variable due to the low incidence of vegetarian dogs in the population and the lack of long term studies (Kienzle Engelhard, 2001). Some diets are strictly vegan and supplemented with vitamins and minerals, whereas others are more lenient and treated with meat-based products in order to increase palatability (Michel, 2006). In a study carried out across Germany, Switzerland and Belgium (Kienzle Engelhard, 2001), nutrient intake of 86 dogs fed a vegetarian diet was investigated through owner interviews and blood samples. The study found that protein intake was not sufficient in over half of those dogs tested, 62% showed sub-optimal calcium levels, 73% showed insufficient sodium intake and deficiencies in zinc, iron and vitamin D were also common. In a separate study, zinc deficiency caused by phytate, a zinc-binding molecule present in soybean meal, led to the development of skin conditions in puppies fed on a soy based diet (Sanecki et al., 1982). The high fibre content associated with vegetable and cereal foods can cause bowel irritation by affecting gastrointestinal motility and absorption of nutrients (Bueno et al., 1981; Earle et al., 1998). Proteins play a vital role in the condition of a dog’s coat, particularly those high in methionine and cystine amino acids because they synthesise keratin (Dethioux, 2008). Complete dog food diets contain these amino acids in suitable concentrations through meat protein, however vegetarian diets show a marked deficiency in these amino acids, and soy protein has a proven negative effect on serum lipids (Anderson et al., 1995); therefore the dog may suffer from alopecia and depleted coat condition when on a plant-protein diet (Dethioux, 2008). Thiamine is a vital part of carbohydrate metabolism and deficiency can severely affect parts of the body which have high energy requirements, such as the brain (Markovich et al., 2013). Clinical signs of thiamine deficiency may take weeks to develop, but will be characterised by a progressive loss of normal motor function such as a head tilt, falling and lack of coordination, ultimately ending in seizures and death if untreated (Markovich et al., 2013). Furthermore, soy has been identified in controlled studies as an important allergen, although incidences of soy allergies were significantly lower than those relating to beef and dairy (4.7% and 34.2% respectively) (Wills Harvey, 1994). Treatment for amino acid, vitamin and mineral deficiencies involve feeding a balanced nutritional diet appropriate for the dog’s size, age, activity level and health, which in a vegetarian diet is possible through the addition of supplements (Michel, 2006). CONCLUSION Proteins from non-meat sources are harder for dogs to digest and therefore are of less nutritional value than meat. While dogs can survive on this diet, the lack of sufficient protein and other dietary constituents such as vitamins and minerals will lead to improper nutritional value which can ultimately affect the health of the animal. From a manufacturer’s perspective, it is possible to create a vegetarian pet food which complies to AAFCO standards of nutritional content, however the economic savings of not using meat are offset by the need to add supplements and highly refined components to improve palatability and digestibility. For the owner, although they may feel less guilt by feeding their pet a vegetarian diet, they must feed a greater quantity to achieve similar levels of protein and nutrients within the animal (Rothberger, 2014) and the general healthy appearance of their pet is often diminished (Dethioux, 2008). Although dogs can survive on a diet of vegetarian-bas ed protein, the natural instincts of a hunting animal still exist from the ancestral wolf and given the opportunity a dog will forage for alternative sources of food (Bradshaw, 2006). The general literary consensus remains that dogs are opportunistic feeders within the Carnivora, and their physiology shows a preference for ingesting and digesting meat protein (Hilton, 1987).

What Extent Can Racism Be Prevented in Society

To what extent do you think racism can be prevented in society? Racism has long been a critical issue in our society and while many measures have been taken to prevent racism, it is a controversial issue as to whether racism can really be eliminated. Many are confident that racism can be prevented, while others are not as convinced. Hence, my topic for this essay is to discuss the extent to which racism can be prevented. Perception is the ability to see, hear, or become aware of something through our senses. It's a way of regarding, understanding and interpreting something.However while perception is an unavoidable part of our life, it has also been said to encourage racism. It is said to encourage racism through two aspects; visual and auditory perception. Firstly, visual perception is our ability to see while auditory perception is our ability to hear. Both are natural abilities that we are born with and we use them on a daily basis but yet, it can be a dangerous tool. For example, when people see a â€Å"black† person, they may immediately respond by thinking that they are inferior, because society has influenced them to think that way.Similarly, when people hear someone with an African accent, that person can be subjected to racism because we have been influenced to think that Africans are an inferior race. In both cases, visual and auditory perception has aided in us to be racist! Another issue is that to stop racism, we first must identify what is classified to be racist and what isn’t but how do we even begin to measure the severity of racist comments? For example, in the article, John Terry was accused for racist abuse against Ferdinand.While many believes that Terry is guilty of being racist, there also others that argues that Terry did not mean what he said as an insult but rather as a challenge to what he believed had been said to him. The chief magistrate believed that Terry was only repeating the words that he believed Ferdinand had a ccused him of saying. How do we judge what is considered to be racist and what isn’t? How do we begin to measure what is a â€Å"severe† racist comment and what can be let off? If someone only said racist comments to defend themselves because another erson is attacking them verbally, should they be let off? Lastly, who has the â€Å"power† to decide whether something is classified as racist or not? However, on another note, there is a number of ways that racism can be eliminated in our society. A lot of measures have been taken to prevent racism and many campaigns and petitions have been set up to challenge racism. This has resulted in increased awareness on the important issue of racism and society has really opened their eyes and started to think before they speak.Many people have become more careful when choosing their words to ensure that they do not offend anyone. Racist comments are so regarded with contempt that people who engage in racism are often criti cized severely by society and these people can even be imprisoned. Thus, this measure has also resulted in a decrease in racist cases in our society. However, in my opinion, while racist cases have decreased dramatically, I do not think that racism can ever be eliminated completely in society.Firstly, even though people who engage in racism can be imprisoned, this does not necessarily stop people from engaging in racism when they are alone or when they are with their close friends who share the same views as them. Furthermore, children who grow up in families that engage in racism will influence them to think that racism is okay and it is extremely difficult to change their way of thinking as its our word against their family’s. Due to the increased advancement of technology, it is also very easy for people to post racist comments anonymously, resulting in a whole new way of engaging in racism that is difficult to stop.Thus, I do not believe that racism can be eliminated enti rely, but I do believe that racism is a very serious issue and we should all play a part to try and decrease the number of racist cases in society. We should always do what we want others to do unto us, and I am sure that none of us would want to be judged based on our race. Most importantly, we should all play our individual role and to think twice before we speak and to understand that our tongue is a sharp tool, and what we say can affect someone’s life in ways that we do not understand.

Huckleberry Finn Persuasive Essay - 1571 Words

Starting the Conversation â€Å"The difference between the almost-right word and the right word is really a large matter- ‘tis the difference between the lightning bug and lightning.†(Mark Twain). Mark Twain, the author of an extraordinary yet controversial novel; The Adventures of Huckleberry Finn had a great way of capturing moments in time and bringing them to life through the use of meaningful and direct diction. The Adventures of Huckleberry Finn has been a vexed novel for it s a use of the â€Å"N-word†. However, many scholars and associations have devised a â€Å"solution† for this problem such as, completely banning the book, creating sanitized versions, or even replacing the book for another American literature novel. â€Å"What is so wrong†¦show more content†¦It is odd to think that a high school student would pick up the word â€Å"nigger† and use it against another student because high school students have already been exposed to topics such as slavery and racism. Therefore, it would be unlikely for a student to use â€Å"nigger† against another student given the fact that race is still a â€Å"volatile and divisive subject† in this country and high school students is not ignorant infants that can’t distinguish the rights and wrongs about the word â€Å"nigger.† (Williams, Randle). At this point in time teenagers are exposed to excessive profanity through the media, music lyrics on TV and many times it is not censored. The Adventures of Huckleberry Finn should be kept in library shelves and schools in its original form because students can receive moral lessons and therefore, mature as human beings. A big part about how a student can react to the novel is how the book is being taught. Teachers should acknowledge the intention and purpose of Mark Twain, which was to appeal to the reader s emotions through the use of specific diction. 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Financial Impact Of Microeconomics - 1276 Words

On September 20th of 2017, the EUR/USD took a steep fall and fell over 100 pips, meaning that the US Dollar has strengthened. The biggest factor in driving this large move was the issuance of the Federal Reserve’s Federal Open Market Committee Statement. Around 1 o’clock today, the committee decided that the federal fund rates should stay the same, being between 1% and 1.25%. Although it was left unchanged, many believe that the committee will reconvene in December to decide whether there will be an increase in the rate. Investors and currency speculators have a strong belief that this is when the rates will increase. Other factors in the current economy include the strong job reports and the low unemployment rate. Current†¦show more content†¦Reading Draghi’s speech, we received a tone of hopefulness for the European Union and the value of the Euro. A key factor that I believe made the Euro appreciate today was the assurance of European banks. 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