Cruelty, it has to be said, to fluffy, big animals.
A sterile monoculture of crops is cruel to millions of tiny, ugly critters all at once.
I'm not a vegan/veggie hater, either! I'm just highly cynical about the explosion of veganism recently, and hold sincere doubts that the corporations leaping on the bandwagon are being remotely ethical in their management of crops etc.
The only way I can see out of it for myself is to cut down meat to the local, organic stuff, grow my own veg where I can - especially the stuff that's shipped in - and take rescue hens for the eggs.
It's not perfect, but it feels less open to exploitation than veganism.