My wife has asked me to stop using the gopher blaster. Says it is too hard on the dogs, and I'm becoming accident prone. I have merely detached it, but not discarded it.
Now, I am trying a piece of conduit 18" long cut on a 45 on one end. Use a probe to find the tunnel. Insert the conduit. Lift it a couple of inches. Insert a dowel to clear it, then pull out the dowel. Insert a piece of Dentine sized xylitol sweetened chewing gum and push it into the tunnel with the wood dowel. Seal the hole.
I don't see the big deal. The dogs get scared of the hair dryer or other dogs barking on TV.
It's always something.
Steve