You've got me a little confused, altho some would say that that is easily done.
A heavy-set 13" Jack won't fit into many of the dens that I see here. let alone the tight logs.
This lad is around that size and just spannable, but I have larger than average hands.
This old girl is 12" and spannable with a knuckle to spare. She'll go just about anywhere that an adult fox will go.
Like the Reverend Russell, I like well-proportioned dogs that can cover a lot of country, rather than the stubby-legged type. I've not seen it handicap them in tight spaces. They go anywhere that