Years ago a this was rage amongst a bunch of us down the Lil Lehigh, Lincoln Parmer used to literally pick up fresh roadkilled ground hogs{whistle pigs,grundsow ect.}if he couldn't get any to shoot at then he'd skin em out clean the hide real well sometimes he'd tan the skin then take and shear the hair off, sometimes he'd even dye the fur.
Only commercial groundhog available that i know of was offered by Fred Reese at Fred Reese Trout Shop, like all Fred's dubbing this dubbing kicked butt .I am glad i hoarded some.
if i may give a few tips make sure you wash the fur really well.Bugs like this hair and dubbing alot.after it is washed make sure as with all your natural dubbings you take special care to keep bugs out of your materials,use Cedar oil,cedar chips, and mothballs.
The guard hairs work great for caddis wings.
If you dye this make sure you use plenty of dye and constantly pull out a bit of material and check it ofr the color you want.
Tight Wraps & Tight Lines
Rick Wallace