It’s implicit in their stance against exploitation. A chicken, for example, cannot give their eggs to a human, with informed consent, and therefor taking their eggs is a form of theft and exploitation.
chickens can’t consent to anything at all. it’s absurd. I oppose exploiting fossil fuel deposits, but that has nothing to do with consent either.
Okay, but that’s a whataboutism and has nothing to do with animals. Think about the lowly bee, for example. People often get tripped up when it comes to bugs and veganism. They’re smaller, and must be dumber right? And anyway their minds work in such an alien way to our own that we can’t assume they even perceive things the way that we do.
And yet if you poke a beehive, the behavior of its inhabitants appears to be something that’s functionally identical to anger, and they begin defending their colony in a way where they seem to be expressing something that strongly resembles a lack of consent to having their home assaulted. So even in this case of such a vastly different kind of animal it’s natural to conclude that any taking of their honey is not wanted - not consented to - and thus is a form of exploitation.
There’s nothing absurd about valuing consent.
it’s fine to value consent. but it’s absurd to talk about consent from something incapable of it.