(Facepalm) You should have asked before just assuming. You better go find that cat, if not, you're going to have serious issues with the owner. Tell that cat "we gon' find you."

*an I just had to.

stop pussy footing around and go find it OP

Did you think that 5tb cat was just visiting? or he broke in because he was a "cat burglar"?!? Sorry, couldn't resist.

Even if it WAS a stray, the decent thing to do would be to take it to a shelter instead of putting it back on the streets. Or ask your friend if maybe her neighbors have cats. You know what assuming does.

And what if there was a stray cat intruding? How can you possibly know you threw out the right one? You seem to lack logical thinking, OP.

Five cats is far to many tell her needs a real social life, talking to cats doesn't count. Throwing the cat out was cruel though.

You Didn't At Least Think To Call Her?? YDI.

Sounds like it will be happier out there than under a couch.

Not to mention, does the owner of 4 cats really care if a 5th pops in? Maybe if it was a troublemaker, but otherwise not.