I don't know whether or not it's needed but AniForte BARF do a good supplement designed to be added to homemade raw diets that contains essential nutrients and vitamins - used to make sure hommade diets are complete. Might be worth a look?
Ddog has been very ill with haemorrhagic gastroenteritis. He's made a miraculous recovery and is bouncing round like before but he seems very tired after ( reduced) walks. He's taking Yudigest already. If he were human I'd be telling him to take a multivit/iron supplement as he was hospitalised for four days. Is there a good one for dogs?