Hi, I have 3 indoor cats, all vaccinated. I also care for an outdoor cat that was abandoned a few years ago. I took her in for her vaccinations earlier this year, and give her Frontline monthly. Two days ago, I saw that her inner eyelids were half closed, and it scared me. Took her to the vet, and she had no temperature, and seemed fine otherwise. He ordered bloodwork, and I brought her home and kept her sequestered in the bathroom. He said he didn't think she had anything contagious.