Sorry I should have been clearer. I meant a sample from one cat over three days. Will edit now.

Ahh ok- yes that's what I'm doing. Except she actually said I could just get 3 samples doesn't matter from which cat since as you said it's more than likely the same thing. Have 100% got a sample from the mum cat who was initially sick so if the next 2 samples are the son it doesn't matter too much.

Thanks for all the advice. Aquarium gravel is a good idea. I'll stop by P@H onmy way home.

No, I'd definitely get all the samples from the same cat!