a friend of mine started trading the lab eggs for treats so when she finds an egg now she brings it to them and they give her treats now they no longer have to search for eggs and the dog doesn't eat them. Not sayin it would work for any dog but you can train most to do some amazing stuff, i saw a dog the other night on letterman that can make waffles, now thats a good trick. Be patient and don't get upset with the k9 just use it to your advantage.
