Sorry I have been away for so long, work has been busy.
Well, I still don’t know what to think. My wife looked over the kitties carefully, including checking to see if their claws were present and no joy; no cuts, abscesses, or missing claws. Granted, Maine Coons are a hairy breed so we might have missed a cut somewhere.
Re: intestinal disorders, it really did not look like vomit. There was no hair in it and it did not look frothy like bile can. I really do not think it was vomit. I have examined their litterbox and everything looks normal. The cats are still behaving normally and seem healthy, happy and frisky.
I am still leaning towards it being a mouse, but we are going in to the vet next week for their one year checkup/shots, so we will have the vet do a special check up.
Oh, by the way. I have never heard of a rat where we live (suburban Denver), though I have seen rats in downtown Denver before. Raccoon, coyotes, rabbits, etc… but not rats. We do have lots and lots of mice around here and they can get pretty big…