how old are they? have they been dewormed? worms can cause bloody stools too.. but as chins suggests pls go to the vet asap. even tho we might be able to guess what is wrong.. we still cannot cure the cats! fyi once back from vet to harden up the stool.. revert to a diet of boiled and deboned chicken only at all mealtimes. halt the dry food until the poo is back to normal.

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prevent a litter fix your critter
ffss