Emily, No, i do not have a humidifier, although I can purchse a used one fairly cheap. I do keep a hygrometer in the house and it reads about 40% humidity. This, according to the face, is a normal mixture of water vapor and air. What do you think, should I get a humidifier?

Jen, thanks for the reply about shelter cats commonly having URI,,and to let it run its course. I was unaware of this!

........wayne