Playing today, I was thinking that many of the beasts of the field are a little too interchangeable.
Yes, animals can get renamed and so on. But it'd be nice to make feel a little less generic. Why do all chickens have to look and behave the same way?
Mixing things up could be as simple as different coloured beasties — green chickens, yellow pigs and so on.
Or perhaps they could be different sizes: a giant chicken that could be squeezed twice as often as a normal one; a scrawny teenpig that only carries half the meat.