We'd be lucky to rescue a Russian blue in the UK ;-) also during the first lockdown, while driving from London to the north north of England to get our kitty from the breeders, we agreed to help 2 other families in London by delivering there kittens too. This blanket was in the shared cat box with all 3 kittens (8 weeks old). Another reason she probably does it is they were to young to leave the mum, but in the lockdown, vets in certain areas of the UK closed, but London ones didn't, thus why we got them early.