hello some of you may remember i bought a german shepherd puppy who is now about 4 months old ...he eats fine goes toilet you know every thing seems ok with him except one thing ...he is going grey first it started off with a small patch but as he has got older and bigger the more grey is coming through he has got about 3 large(ish) areas on his side does anyone know what this could be? do you think i should take him to the vets? or am i just being paranoid lol