How can I get dried diarrhea out of a carpet?
First it needs to be rehydrated. Ugh, I know. I would use Nature's Miracle or another enzymatic cleaner. You will need to saturate it with the enzyme cleaner, cover with a warm wet towel and let sit for a couple of hours. Clean up what you can using strictly water (no soap, it kills the enzymes) then repeat the process. You might need to do this 2-3 times.
Try a clean dry toilet bowl brush & a shop vac- like a dental hygienist and brush out the worst of it
and then yes, Nature’s Miracle.
Vaccum up the dried pieces. Use a floor cleaner to clean the carpet.
Try mix of baking soda, water and vinegar. Rinse with clear vinegar water and dry the area well so that it dries quickly.