Vegans don't believe in using any animal products in their diet, and usually in every other aspect of their life, so no leather bags or beeswax candles. Some do this for the supposed benefits of the diet, but many do it because they believe it's wrong to exploit animals. Fair enough! But it's a bit confusing that many vegans also own pets, who they also force to be vegan, even if that's not their natural diet. In fact, cats will die if they cannot eat meat, which contains important amino acids their bodies need.
A Twitter user named @nocroissant who is themselves a vegan recently questioned her fellow vegans everywhere: if you want a vegan pet, why not get on that doesn't need to eat meat? They're called herbivores.
An excellent point! Lots of animals don't need meat to be happy and healthy, and it seems much less stressful all around.