I am doing a Zoology degree and it is pretty much Biology with no plants, so is twice as in depth about animals. It depends on the University as to how much animal contact there will be and their facilities. You can choose modules to suit what you like, so I did two about animal behaviour, within a Zoology degree. I am at Newcastle and there are two Uni Farms with cattle, and I am doing my final dissertation on cattle so will have quite a lot of live animal experience.
Animal welfare and behaviour is much less scientific from what I can see, and more of a psychological outlook on animals rather than biological.