My goodness ! As a cm and cat owner I felt my jaw drop when I read the original post. I know how much is costs me for flea/worm treatments and injections for my two cats so can't begin to imagine how anyone could cope with 20 cats. I always understood that Ofsted insisted on vet approved products for fleas etc so no trips to the pound shop pet section for me.

I really wouldn't be happy as a parent using a childminder with this many animals without asthma etc coming into the equation. The smell in the house can't be very nice. Sorry if that offends anyone

By the way, my children went to a childminder who had cats ,as we do, so it really is to do with numbers of them. I would be checking her Ofsted report too.