Artemis Food & Blowing Coat

[Glacius]

I have been using Artemis dog food for over 12 months now. I have a dog (malamute) that blew his coat about 4 months after starting it and thought all was normal as mals blow their coat about once a year and generally in the warmer months, but now he seems to be continuously blowing coat? He looks to be in good coat tho every time i bath him more hair comes out and this has been going on for about 9 months... I figure the coat is coming back just as quickly as it's going as he doesn't look out of coat, but i think he would look better if he wasn't rolling it all the time. I have also noticed he hasn't lost any guard hairs in this process, his black guard hairs especially along his topline are reddish/sunburnt on the tips and they have been like this since last summer.

Apart from this he is a healthy, active happy boy and his coat is in great condition only it's continuously dropping, his thyroid has been checked recently and is fine and the only thing that has really changed over the last 12 months is his diet. He is on the Osopure performance atm and has been on the performance pretty much the whole time as he is very high energy and found we were having trouble maintaining his weight on the normal adult - we also feed raw chicken carcasses/chicken wings a couple of times during the week as well as fish (sardines) on the weekends. I have 2 other mals on the Artemis adult both are doing great on it, one previously had stomach upsets and the other bounced back from having a litter last march like it was nothing! Could it be the performance formula that is causing my boys coat drops?? We have pretty much always fed him a performance diet (no matter the brand - previously it was Pro Plan) as he is so high energy. Does anybody have any suggestions or have similar things going on with Artemis dog food??