Assuming nothing else is going on, I would switch to a completely bland diet (rice and cooked meat with some pumpkin) to settle the stomach. Once poop firms up, I would slowly switch to a one protein/no liver for now raw diet with pumpkin (I go something like 1/4 raw/rest cooked then 1/2 and 1/2 etc). You can also try a probiotic. But that would be something I might try after if the other things aren't helping.
My dogs always get a bland diet (no raw) when they are having poop issues. If they are having prolonged issues - my philosophy is go simple and make changes one at a time so you know what works and what doesn't.
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Leyna vom Grunenfeld, HT, PT, HSAs, HRDs, RLFs
Paisley vom Kirschental, 3/25/13, aka "the devil"
Levi vom Grunenfeld, RIP 9/5/04 - 3/4/13