Some breeds of goats are better milkers than others. If you have a problem goat, talk it over with the cooperative extension agent in your county, or a veterinarian There may be a simple solution Donkeys Noisy, braying donkeys are an asset to any petting zoo. They are friendly, and love to be petted. Be sure to clean out their corral every day. But never feed donkeys at a farm petting zoo by hand, cute as this may be.
Feed donkeys only in hay racks and grain containers.
Donkeys like to have companions, so it is all the better if you have at least two at your petting zoo. Cooperative Extension and the WWW will have information on the care of donkeys, especially overeating and hoof trimming. One year I had a group of about 15 delinquent boys from a nearby training school come for a tour of the cider mill and petting zoo, accompanied, of course, by training school staff. They saw me in my bee suit , saw the smoker smoke, and actually felt an empty honey comb. They then made a beeswax candle from colored beeswax foundation.