Used to feed the Dogs a veggie complete dry food. Thy were quite happy on it, but it never stopped them eating meat if it was offered to them (grandad mainly). Cats, no.
Interesting comment on a TV programme the other day. Seems canines were originally meat-eaters only. But, somewhere along the line, they evolved the ability to digest starches. Just as well, for them, and the dog-biscuit and dry food manufacturers!
As a vegetarian and working on a vegan way of life I can understand why people would want to feed their pets a non meat diet, I have 15 pets and I also have a degree in animal management.
All my carnivorous pets are fed meat, some animals are obligate carnivores, meaning they must eat meat basically.
Feeding a meat free diet is not recommended as this could have serious health implications for the animal, best advise would be to have a herbivorous pet :)
Don't do it, there is no good reason to do it and it would be totally unatural , we feed our dogs on a raw meat diet, they do also have a few raw fruit and vegetables as well.