I've taken my very sweet rescue dog to the vets this week. She's quite timid and for as long as I've known her she nibbles her feet. No mites or any obvious problems. She doesn't generally hurt herself, but did make her foot sore recently when upset by fireworks.
The vet has also noticed some hyper pigmentation and ear wax in one ear and has suggested a special diet would help.
Does anyone have any advice on this? Vet suggested Royal Canin (but they obviously have some kind of relationship with them, although suggested I could buy it online)