About a month ago I posted on here about Rosco having thick mucusy poop. I took him to the vet and his GI was inflammed again. This is the second time. The vet gave him antibotics that Rosco took for a month. While he was on the med. his poop seemed much better. Well, now he is finished the med. and he is pooping thick mucusy yellowish orange looking poop again. What is causing this??????