Kennels concrete or not

Small kennels of concrete, wood, dirt or anything are not only hard on a dogs feet but hard on their bodies IF they are not given proper exercise. Especially growing puppies. If they get addiquit exercise of the right kind then small kennels are no problem. Running dogs such as sight hounds and lurchers are harder on their feet and muscles than curs and bulldogs eventhough a cur might put it's feet down a lot more during an average hunt, the way the sight hound dog runs at speed puts more stress on its ligaments, tendons, and muscles. That's not to say an unfit cur or bulldog won't suffer the same problems because they will, just not as frequently seen. Hence the reason I even mention it. If a person doesn't hunt their dogs often or keep them fit with addiquit exercise and just keep them locked up till you go hunting every now and then, you could very well see the same problems arise in your dogs as the people with sight hounds and lurchers will often encounter under the same circumstances. Having said this, I know of curs kept the way I have described and I have never seen them get such an injury like my dogs are prone to get should I house my dogs under the same identical circumstances.