at the risk of losing another karma point, it's akin to stretching tightness. you hit the thumb on the muscle (nail on the head) when you said some may be too muscled up to walk. pulling on their tail will loosen the tightness that you can see in concentric rings around their tailhead to about mid distance between hooks and pins. i talked earlier about the bunchy muscle on my heifer, and how it was also in the total package bull calf. think of your back and knots. with a good adjuster, chiropracter, they can easily, well, they have to burn calories to do this, but find where the bunching is that leads to where they need to be loose. you can actually see the muscle in my heifer clearly, not so much in the calf, he's too young. this is why i almost think it's a least penetrant double muscling or some mumbo jumbo thing going on. the tail head will just settle in nicely when you do this. also, i noticed this dramatically in my draft pick steer last year, that he was really tight on one diagonal, and was almost dragging a rear toe when he was really fat. bear in mind, i got him realllly fat, almost about 3/4". we stretched him and adjusted him and he would be fine for a few days. one time we did it and he took off like a bolt of lightening, kicking his heels real high, tail straight out, came right back and tried to rub on us with his shoulder. really amazing. i highly recommend doing this, and i know it's sounds goofy, but you really can pick up your animals feet. gives you a lot more confidence clipping on them down there too, knowing that they know to be bothered down there beforehand. in horses, there is a double muscling gene just over this area. i think mr. san peppy was a carrier as his son peppy's pep up had it, and threw it. i guess it became popular for a while, then disappeared. the muscle was over the hooks to pins area, and not the rear, like in cattle, and in a more dramatic form all over. or it could be something else. who knows. but the thing is, the animals respond to it. i would definately do it on some of the bloodlines that seem to throw shorter striding but otherwise decently made skeletal made animals that for some reason, even though they look like they should stride but they don't. you can get the same effect by doing this with cats. you know when you sit on the stool, and all the cats come wanting attention sticking their tails in the air, you pull on them, letting the tail slip through, they come right back for more. if you put that in a youtube video, people would think you are weird, not like everyone doesn't think i'm already weird (or crazy!)