Dr. Federico Calboli very kindly sent
me this BBC link to a video of a fox in Canada
sliding through what around here we would call a pig fence. I believe the mesh is 2 inches wide by 4 inches tall -- a 12 inch perimeter on a slightly bendable square. Since the BBC video does not have embedding, and since links tend to disappear like mist, I took a few screen shots and have posted them above.
I have written rather extensively about the chest size of red fox here and here and here and here and here, and here, and here, and in the book, and even reposted the paper by Paolo Cavallini which measured red fox around Europe and the world. The bottom line, is that a red fox chest is 11-14 in circumfence, and is as springy as that of a house cat.
Take a two litter Pepsi bottle around the middle -- that's the biggest fox chest you are likely to ever see. If your dog's chest is bigger than that, it will have a hard time reaching at least some of the fox found in natural earths, with their complex twists, rocks and roots.
Forget it if someone tells you that if the dog "really wants it" it can dig to it. A dog cannot dig rock and root, and no dog can excavate 6 feet of tunnel underground, much less 20. As for "flexibility," nothing is more flexible than water or sand, but you cannot pound two gallons of water or sand into a one pint can. There are limits!
As I note on the main Terrierman.com web site, chest size matters more than any other single physical aspect of a working terrier: "A working terrier should be able to go straight through most of the den pipes it has to work. In America, that means a dog with a chest of 14 inches or less -- the same size as that of a red fox, adult groundhog, or average raccoon. An over-large dog
Are you still listening to show ring matrons and wikipedia theorists when it comes to working terriers? There's your mistake!
As I have noted in the past, the real expert on working terriers is the fox, the groundhog, the raccoon, and the badger.
The real test is the hole, and not just once, but dozens of times a year.
No man or woman who digs often on their dogs has ever wished for a larger dog!
will have difficulty negotiating curves and constrictions, is more likely to get trapped underground, and will find it harder to maneuver away from the slashing teeth of the quarry. A dog 'bottled' by dirt behind and dirt or quarry in front, may have a difficult time getting enough air."
In other posts, and bits
I go into detail about the average size of American working terriers
(real data) and how to span a terrier.
|Mountain (my big dog) in a 6 inch pipe.|