She's an easy keeper , but she has had horrible dandruff and some skin issues.  My vet wants her on fatty acid supplement.  How much would I need to give to help her coat but avoid weight gain?  Anyone else find that kind of balance and like it?

If you have soy in any of the feed ingredients, try taking that out first.

Give a cap full of Wheat Germ Oil for a month and see if that doesn't do the trick.

I would recommend flax oil for skin issues. It is higher in omega 3's than omega 6's. It is the best oil for skin issues and any other inflammatory problems.