DH is a bit of a sneezy pot at a bit of dust. Have had kittens since the end of Jan. He was a bit sneezy took piriton, but seemed to be OK. However, the last 2 weekends (when he's around them more) he's had a terrible cough and breathlessness at bedtime, piriton hasn't helped. He's looked it up and thinks it's the cats. They are limited to the kitchen and utility. Having had them so long now I don't want to let them go.
Is it the cats? What can I do?