Regarding hunters, your toons don't have to eat. Why should your pets? Its like taking a crap. They don't have to do that either - its just assumed it happens. IMO if someone wants to complain about realism, removing ammo is worse than removing the need to feed pets.

What I wish they would have done instead of fooling with food and ammo is make ranged weapons usable at point blank range. Thats definitely not realistic (at least for guns and xbows).