The inground portion is "six feed deep"... how long is a "feed"? If
you feed them, won't they stay?

Since these are dogs, can't the county just put collars on them with
electronic zappers as part of an "Invisible Fence" like I see in the
pet stores?

(Okay, okay... I get they idea that they're big rodents, They look
somewhat like the Canadian "Ground Hog", although slimmer... the
Canuck version probably needs the extra insulation).