I was thinking the same thing.
First, this took place in the UK. I think they have some rather strange quarantine and health practices.
I don't have all the details, but the resident cat was deemed: 'riddled with ringworm' and the kittens were of poor health.

I think it is so sad, and it scares me, although I have been 'trained' on how to spot ringworm and how to do the dish test.

I'm worried a bit about my two perfect boys and the fosters. I really want to help the rescue.

BTW, the rescue is currently 'shut down' due to a ringworm outbreak. I know they know how to hanlde it, as it does happen from time to time.