Are questions about feeding companion animals on-topic for this site? The subject of vegetarian cats or dogs, for example, tends to be an inflammatory topic and some vegetarian forums will discourage or block that discussion outright.
We did briefly touch on this question a couple months ago when a question was asked about Vegan biscuits/snacks for dogs. This led to a question here in Meta ("Vegan diet for carnivores") where some heated opinions were shared, but the question was unfocused and was largely in context of the original question that was asked.
I feel that this question is worth revisiting in a more focused way, because I noticed a post last week asking about "Vegan fish" and Quorn products for pets. It seems likely that over time we'll get more questions from vegans and vegetarians who are thinking about what to feed their pets.
Ideally I would like to see the on-topic page amended with some text that clarifies specifically whether questions about food for pets are on-topic or not.