I can imagine this poster's chortle thinking to themself, 'they thought I meant the animals!'

aren't plants also sentient?

Isn't all life sentient?

If not, where do you draw the line? "It has eyes and bilateral symmetry and an endoskeleton looks vaguely human-like so I can anthropomorphize it"? "Only members of the animal kingdom are conscious"?

I always wonder what vegans think is going to happen to all the pigs, cows, and chickens if people stop eating meat?