Hi, posting for advice, our lab who is food mad has been off his food for 3 days, he will eat chicken, cheese and ham but not the actual dog food, we changed his food yesterday as we thought he just did not like his food and overnight he has explosive diareah which could be because we changed his food ( although he did not eat much of that either) trying to work out if he is sick, fed up of the eat or just off dog food and now just wants fresh chicken for every meal!!!!