It's possible to develop an allergy to almost anything at any age

Oh great. That is not the answer I wanted to hear. Not your fault. But I love that cat. At the risk of sounding melodramatic, I'd rather have myself adopted out than give her up. I guess I'm stocking up on Benadryl and Kleenex, and getting used to this.

Very interesting about the synergies. It could be a combination of spring pollen and cat dander. But there's no pollen *in* the apartment. It's worst when I go to bed, but I don't think i've changed detergents in the past few months, so it probably isn't the sheets. Mildew, maybe? Vancouver has a very damp climate, to put it mildly.

Thank you very much, and sorry to natter at you.