What is wrong with one of my rats? Please help

[Stewart_Reptiles]

How much protein? I don't know exactly, but the dog food I've been using for 2 years says "High in protein." I think if it was the food, other rats would have shown the same symptoms as him, but I could be wrong.

Not all animals have issues with high protein diets, just like not all animals have food allergy, I would make sure not to feed too much protein.

Quality lab block with about 18% protein is what I would aim for high protein food in the mid to high 20's% is something I would stay away from with rats.