Hi Mike,

I would have this checked out by your vet. A small amount of blood in the stool isn't usually cause for concern, but seeing blood come out of the rectum can be serious.

Please do not use any OTC dewormers. They can cause a cat to become very sick, or even die. If your cats have parasites, get something safe and effective from your vet. OTC dewormers and flea products should never be used in cats.

Regards,
PHKitkat