well it pumps you up but some people can't handle getting the jitters.
My Neighbor's dog, Oka, is fed one egg a day. This helps with its fur. It's the most beautiful dog I have ever seen!
But if your dog has some kind of special condition with its skin or fur, you should ask a vet for help.
A couple time a year, my dog gets a bad case of dandruff and her fur looks very dry. I use an Omega 3 oil supplement made specifically for dogs. A few drops in her food daily for about a week clears it up.