With the undead ability, Scourged Whelps always finish their turn and get an additional attack instead of dying. Also, tail sweep does additional damage (which can't be deflected, missed, dodged or blocked) if your opponent goes 1st. Speed is the last thing I want on my Whelp, it just isn't needed. H/H or H/P are quite good.
All that said, anyone who has a Scourged Whelp of any breed or quality is extremely lucky.