Thank you everyone for the suggestion! We have been boiling the chicken and giving white rice. And we try to feed him a small portion every couple of hours to make sure his blood sugar doesn't drop.
I just wasn't sure if this was common that the food would give him diarrhea or something. But I'll definitely try the canned pumpkin! Do you just heat it up with the rest of the food? Or we thought that the drastic change of food could have caused it. For the two weeks we've had him, he hasn't had a solid stool, but maybe once? I guess he's also just become a picky eater too.
He weighs around one pound.
Thanks again!