Not as unusual as you may think. Usually caused by a dietary deficiency, animals will seek out that missing factor elsewhere. Dogs and coal or tar are a classic example, there is a mineral or trace element in there that your dog needs. Your vet can suggest a better alternative.
can dogs eat sauerkrauft
Can dogs eat noodles
no leopards do not eat dogs
No, egyptians did not eat dogs.
NO, lol but dogs eat beans
Prarie dogs eat grass and weeds.
No why would they eat dogs would you
No, but rattlers eat prairie dogs.
It's not. Dogs can eat spinach.
Dogs will eat until they explode -they have been conditioned to eat while they still can.
they say when you eat hot dogs its really dogs but its not its just meat from a cow
most dogs do not eat your brains but if you have a mutant dog he will.