We recently got two hens. One is laying and seems healthy. The other has had loose stools and isn't laying though she's about nine months old. I took a stool sample to my cat's vet (who doesn't treat chickens) and it came back with round worms and a protozoa--histomonas melegridis. I'm assuming I can treat the worms with wazine/ivermectin. Do I need to treat the protozoa seperately? Does anyone have experience with this?