Feline herpes could also be a possibility. When one of my cats was a kitten she would get scabs on her nostrils, the vet said it was herpes and that in most cases the kitten will "outgrow" the virus.
"One cat just leads to another." - Ernest Hemingway
Meowy Meowers - Angus n' Finn - 5 yrs old
Barky Barker - Skylar - 4 yrs old??