I’m sure she doesn’t have anything serious like PBFD. The best advice given that I know how worried you will be is to get her checked out by the vet. Check with them which lab they use for testing because some of them like PALS (Pinmore) can take flipping ages and are renowned for losing samples. I can recommend the lab in Manchester Labokiln, the are quick efficient and do all their tests on site.
Given her age this is probably her first really big moult.
Given her age this is probably her first really big moult.