Hi, I have a 2 year old border collie X Lab. He runs constantly all day (lives on 5 acres). Recently he seems to be loosing weight. He has been wormed, I feed him a combination of dry kibble, can dog food, raw meat, table scraps, vitamins - two meals per day. Is this correct and should I be feeding him more, this amount seemed ample. I have received comments on his lovely shiny coat. What can I give him to put on more weight. Thanks Annette