My 2 year old goose (who was fine yesterday) is practically lifeless and vomiting his food up. Ive never seen it before. My chickens and ducks are in good health but my other 3 geese are looking a little mopey, not sure why, but no signs of vomiting in them yet. Theyre being feed on scraps and a few pellets plus free ranging grass all day, they have plenty of fresh water. Droppings are ok but they dont seem to be feeding as usual also no honking when they see me which is very unusual. Im wondering what could cause the vomiting? i.e infections, diseases, poison?!? please help, i feel he may be gone to far but i don't want to loose them all!!