Had our Corgi there three times - first time was OK, second time Joy overbrushed him and he developed tiny little scabs and most recently, according to our vet, he was again overbrushed and his coat not dried properly. He was at the vet because one of the places that was overbrushed opened the skin and it got infected. He became lethargic, lost his appetite and is now on antibiotics (and is, I'm happy to report, doing better).