Do you have criticism against his more confident claim that factory farming is wrong? To him it seems like ultimately sentient animals (capable of feeling pain

Do you have criticism against his more confident claim that factory farming is wrong? To him it seems like ultimately sentient animals (capable of feeling pain and suffering) are moral patients. You can also see his perspective on dolphin gangbang in his discussion about reintroducing or controlling predator species (these seem to me to be morally similar situations); he is not very confident on such marginal cases.