Here I am, frequently the poster answering "its complicated" and "no easy answers", asking for...
an easy answer. 
My flock is in my sig, its big cokmpared to many, they share the same space (goats, chickens, and ducks). Individual treatment is impractical. The cat, at least, I can treat individually - its new, was a stray, and is still too young to get fixed, but it needs to see the vet anyways.
The goats I obtained from another owner, they were already adults and NOT socialized to humans. Only one will let me touch it at all - and almost never tolerates a check of the lower eyelid forcolor and consistency. Last month, it was fine.
Why am I worried?
Last night, the cat was retching up white foam, wouldn't eat all day or drink. Its new and a stray - so an infection vector, and also not on a wormer. At the same time, though the temps have fallen around here, some of my chickens have had some looser droppings - more like whipped fudge icing or brown spray foam than I'm used to seeing, and a few of them were deposited with a small bit of liquid. There have been tiny dark brown/black dots in a few - which could be anything.
Oh, and I'm unusually cautious because my sole female goat just had twin boys, still you young for their CDT shots.
New dad syndrome???
Mitigating, I butchered five birds last week, got all up inside them. Typical size for the age, good body condition, typical meat on the keel and fat layers, good liver and kidney colors (dark, uniform, glossy), nothing unusual in the intestinal tract based on external inspection, heart and gizzard in good shape too.
In any event, I appreciate the information offered, have no idea how much the goats weigh, and will try to figure a way to dose the feed. With your very helpful input, that's my best option, since at least they are fed mostly seperate.
THANK YOU ALL!
