broken should be brown ... bad typist.
Anyway the long and short of it is that your kitten may either have a nervous condition (like mine) and/or may have a food allergy (like mine). Try the Chlorhexidine shampoo if your kitten will allow it and then the Chlorhexidine pads. I also give my cat...
My cat was diagnosed with a fungal infection on her feet from the vet. She's a 6 year old Cornish Rex rehomed to me. When I got her home, I had to get all her shots, which she'd never had and on the second visit to the vet, I asked what the broken icky stuff was on her feet and around her nail...