bro, madami cause why kamot ng kamot dog mo, since ayaw mo muna dalhin sa vet, try to eliminate possible causes one by one.
Indoor ba dog mo or outdoor?
Baka may allergy sya sa mga binibigay mong food/treats? no chickens. no fishes.
Change your soap/shampoo to organic soap 100 lang ata yun.
also meron mga mites na microscopic lang, baka kala mo lang walang flea..