I do believe that animals are capable of feeling emotion, maybe not quite in the same way as we do, but emotion none the less.
I have seen some animals that are quite dumb, and kind of blunder through life, but I have seen some very intelligent critters, who I am sure feel emotion. You can watch their eyes flicker as they are thinking in what ever way animals think, and are planning their great escape or some other escapade.
You can see emotions in cattle, a switch of a tail when milking tells you they are annoyed, or pawing the ground they are getting nasty. A soft moo when they see someone they know and they figure goodies are on the way, and an annoyed cow when someone they don't know comes around. They know who they "like" and don't "like".
some animals you don't "click" with--you don't like them and they don't like you, but come around just for the food or what you can give them. Others seem to like your company.
If you don't think animals have emotions-fine, but I do think they do have emotions to a certain degree...