[Cyndi]

Sounds like, to me anyways, if he’s not used to having liver and he ate a lot of the liver treats that might have caused it. I would definitely stop the kibble for a bit and, like crazy4cats suggested, do either boiled chicken and rice for a few days and the pumpkin. I just sounds like he had too much liver or too much something new.

But, if the runny stools continue for more than a few days after giving him the chicken and rice, I’d call your vet.