I was out the other night and the weather was poor, very wet underfoot with more rain falling. A hind was shot, and ran for maybe 20m tops. Now I always set my dog off to locate but that night he struggled. He initially went within 3-4m of the carcass but gave no indication what so ever. I called him back (we still hadn't located by this point) and sent him in the known direction it went. He walked right past it, gave a slight indication to me then continued to carry on along the scent from where she had ran from.
My question is, does rain make the scent weaker? I know if my dog is wet, he stinks!! I'd have thought that a wet scent would initially be stronger, obviously after a whie, the wet would reduce the scent to be followed...