I found a cat about 2 weeks ago and brought it inside. I have 2 cats and kept the cat isolated for a week or so. I took it to the vet and the vet said it was healthy, so now it is around my other cats. Now my 2 cats have watery eyes. It's not constant, just every once in a while one eye starts tearing. They've never had it before this new cat was around. Should I take my 2 cats to the vet, or should I just wait it out?