When I got Jazz at 14 weeks she was very sick. She had a URI, ringworm, earmites and tapeworms. It took quite a while to get her healthy and then about a month later she had a flare of the URI. I was really worried but my vet said that cats who had a severe URI as a kitten will have bouts or flares of it every few months until their first or second birthday and then probably won't have any problems again until they old age. He was right she had a few more flares but has had nothing for over a year now (she turned two in May). Maybe this will be the case for Reno.