I didn't realise that cats can lose fur so quickly through stress. We took Ellie, Daisy and Cleo (all aged 15 months) for their booster injections on Wednesday and they were losing so much fur in the vets (only a three minute drive) which he said was due to the stress. We had an unusually difficult time getting two of them into the carriers and I think they knew I was worrying too but have never known cats to lose so much fur so quickly. All fine as soon as we got home and just about forgiven me now !