I have flock of chickens, ducks and a goose. The chickens are various ages, but most are young (not quite laying age). My rooster fell pray to the heat of the summer yesterday, so we brought him inside and babied him. This morning, I went to check on him and found roundworms. Unsure if he vomited them or passed them. So, obviously I need to worm my flock. Is there a wormer that will work for the whole flock or do I need to use separate ones for the ducks, chickens and goose? Thanks for any help!