You could try eliminating the treats and see if the diarrhea clears up. I fed my 3 chickens a little scratch grain & they gradually started having diarrhea. I stopped the scratch grain & the diarrhea stopped. I’ve found that my girls do better when the treats are few and far between; ymmv. Hope they feel better soon!Purina Layena pellets is their main diet. For treats: apples, cabbage, oranges (very sweet), strawberries, bananas, shrimp salad (dried shrimp mix)... I think that's it. I'm not sure about.the fecal float. There's a vet that takes chickens nearby, I'll give them a call and ask!