I've been back and forth to my vet, we did a poo gram stain, crop gram stain, multiple x-rays with barium and nothing has shown up. This started a few weeks ago now, seemed to be very sudden. One day he was fine, then the next his poop was loaded with seed. From then on it's been variably better and worse. Lately his appetite is failing and all he wants to do is sleep, he has also lost weight. The vet gave me an antibiotic that hes going to start today in case there gram stain missed something. His diet is zupreme smart selects seed, and fresh veggies (carrots, kale, broccoli, cauliflower). I've had no luck getting him to eat pellets. I also do not know his age, as he was rescued. Please any opinions are much appreciated I don't know what else to do.