Bright Red Blood in Cat's Stool - Poo found in Tub

[Freedom]

Separate them so you can figure out WHO, and then off to the vet.

Note that, if what you suspect is correct, during the time you take to ID which cat, this will all clear up and you won't ever really know which one it was.

This is one of the problems with multiples; as I well know. Finding out WHICH ONE has the box problem.

[columbine]

Yes, it's definitely a question for the vet! But don't panic - blood in the stool indicating cancer is usually from higher up in the intestinal tract, and comes out partially digested and black. Bright red blood is more often, as you surmised, an indication of constipation.

Please keep us posted!

Love, Columbine