That will be pretty hilarious to have a hyper intelligent goat! My only requirement is that your character be able to speak the common language either in a verbal manner or a telepathic manner. 

Also posting some new creatures up there and I have decided also that those of you who do not travel on four legs already may bring an "old style pony" with you. Make your choice carefully on the breed and the characteristics it has, should you not wish to have an equine companion you may bring an "old style canine" with you. The term "old style" refers to those dogs and ponies that exist currently in 2014.