Hi hello you seem new to veterinary science and animal welfare in general so let me educate you on some topics that you are completely wrong about
1) “side reminder that some dogs can have vegan meat and be completely nourished and content, loving and excited over their meals.”
This is an assumption. The assumption that dogs are omnivores remains to be proven, whereas the truth about dogs being natural carnivores is very well-supported by the evidence available to us and is understood by many science welfare groups, universities, and doctors of veterinary science.
Dogs and wolves share 99.8% of their mitochondrial DNA, those who insist dogs did not descend from wolves must disprove the litany of scientific evidence that concludes wolves are the ancestors of dogs. And guess what? The wolf is a carnivore. Since a dog’s internal physiology does not differ from a wolf, dogs have the same physiological and nutritional needs as those carnivorous predators.
By stating otherwise you are ignoring and disregarding the work of contributing doctors, educators, and researchers who have compiled over 300 years of research and observations of the wild canine.
2) Do dogs and cats eat meat? Absolutely. With the right nourishments, can they live, thrive, and live a happy and healthy life without it?
No. But congratulations, you got one thing right, dogs and cats eat meat. Can they live a happy and healthy life without it? No they cannot. Cats and dogs health is largely dependent on the body’s ability to digest and make use of the food that is a part of their natural diet that is supplemented from meats. By creating a lack of naturally produced (meat, not supplements) protein in the body of the animal, you are putting your animals at risk for something called protein-losing enteropathy. Although this condition can affect any breed or age of dog, some dog breeds are more likely than others. That being said, feeding your dog and cat an all vegan or vegetarian diet and expecting them to thrive on it is a gamble at best.
There is an entire array of problems that can arise from a lack of natural protein.
Occasional bouts of diarrhea
Lack of energy (lethargy)
Difficulty breathing (dyspnea)
Legs and feet may be puffy or swollen (edema)
Infection in the intestines
Bacteria such as salmonella(from rotting plant material)
Intestinal parasites like hookworms and whipworms
Inflammation of the intestines (inflammatory bowel disease)
Stomach or intestinal ulcers
Problems with the movement of lymphatic fluid out of the intestines (lymphangiectasia)
3) “He/She seems healthy to me, and also seems interested in the food you’re about to feed them.”
Hey, wrong again. This dogs nose is dried out, it is almost a pale white pink, this is an indication of dehydration or something more serious. The eyes are not clear and bright as they should be, they are red and puffy around the edges, the lining of the eyelids should be pink rather than red. This dog also has a blank stare on its face, and the nose is not pointing at the food, this means the dog is uninterested and is a sign of lethargy. This dog is begging for this meal to be something nutritious. I work at a highly respected veterinary hospital and I see this more often than you would think, I know how to tell when a dog looks malnourished, and so would you if you worked and studied every day in the field of veterinary medicine.
Next time I hope you will take the initiative to educate yourself on these and other important topics on the care for your animal, before you preach something you have no idea about.