Yes, you’re holding a sentient being as a slave for your amusement.
Nope, I’m holding THREE of them as slaves for my amusement.
I’m aware of some vegans stances being against having pets, but if people are feeding their cats and dogs a vegan diet at least some portion of vegans aren’t against it.
For folks who want pets who are also vegan they should choose a species compatible with that instead of forcing it on an animal who’s biology isn’t going to thrive under those conditions.