Astro has quite a dull, unhealthy looking coat...I don't know why? Here is what I have done and therefore ruled out: Ulcers - He was scoped about 1 month ago Worms - I had a feacal count done at the same time as the scope...worm count was normal. He is wormed every 8 weeks, bendizole in the winter and mectin for the other 3 seasons. Paddocks cleaned and rotated. Stress - He went through a mental breakdown about 6 weeks ago, so I rested him, and got him checked over, put him on a probiotic etc and he is now absolutely fine. Diet - His diet is balanced, containing mostly roughage...my equine nutritionist helped me to formulate it. He gets grass hay, lucerne hay, oaten chaff, lucerne chaff, pellets, lupins, boiled linseed, barley, vit/min supplement and an electrolyte when he sweats heavily. Hair test - I got my equine herbalist to hair test him (brings up tonnes of stuff) and she found liver and nervous system probs, so he was on a mix, but with no change to his coat? Grooming - he gets ridden 5-6 days a week and always gets groomed before and after work. I really do think its an internal problem though. The only thing I haven't done is blood tests. But what exactly should I be getting tested? I don't want to put him on a coat supplement, because I want him to shine from health - not oils and other coat enhancing supplements. He has previously had a very shiny coat, so I know that its possible for him. He is fully vaccinated, all the other horses around him are healthy, all his vital signs are consistantly normal, he drinks plenty of water, he's working like a champion, in every other way he seems perfectly healthy, just not his coat? Its hard to say when it all started...his coat probably started deteriorating about 3 months ago...no major changes between now and then. Any ideas would be greatly appreciated!