brookcove
Posted : 5/11/2008 10:58:35 PM
Zinc is one I wouldn't supplement without the help of a vet experienced with dietary supplementation, or a nutrition expert (which I think you had this kind of advice, jessies mom?). When my son was little, we were supplementing zinc on the advice of his pediatric gastroenterologist, and it was very tricky making sure we weren't oversupplementing. We had to figure out absolute values on the food he ate every day.
That's why I hesitate to say, "Oh, yeah, try zinc!" I know it's often implicated in skin problems, but often a change to a food naturally higher in this mineral will be sufficient. Oysters are very high in zinc, to the point where one must be cautious of overexposure if one frequently includes these in the diet. Nuts and legumes are good.
Of the animal proteins (all of which are excellent sources and sufficient for most purposes), turkey neck and head (yeah, weird), and beef or lamb or goat shank tops the charts on zinc values, that is among easily acquired meats. Well, I guess the head's a little hard to get, but neck is very easy to find. Foods that include turkey would most likely be high in zinc, I'd guess, since the poultry in most dog food is from "frames", which includes neck.
Sidebar: Zinc signalling (the use of zinc ions as neurotransmitters) is a burgeoning area of study in microbiology and may hold the key to why zinc is so vital and yet has been difficult to explain its exact roles in cellular function.
To the OP: I wouldn't change anything in the way of supplementation if you are happy with the way your dog is right now. I was merely mentioning easy ways to increase linoleic acid exposure without having to change dog food. I believe on omega fatty acids, it makes more sense to supplement anyway, to ensure freshness - even with preservatives, OFAs do not remain stable long after heating, packaging, travel, storage in central distribution centers, travel again, and finally shelf time. But if your dog is fine now, there's no reason to change anything.