I Have a 7month blue that seem to have a lot of issues with his coat. About a 2 weeks ago he had a tumor on his back and all of the test results came back negative. After we was about 13weeks old is when it started around is neck his coat is fine but his back is shedding and his face and legs turned a lighter grey. Idk i tried giving the medicated bath only helps for about a day or to then back to flaking. i have him eating a raw diet to rule out allergies are there any suggestions that anyone has for me?