Thanks all! ER fixed me up w/soft brace and sling. The entire incident was my fault. I've been successfully using the double lead for a couple of months now, it's just this time, I didn't untangle myself fast enough when one of them circled back behind me. When they went to greet the neighbor bringing his trash to the curb, the fork in the leash caught me below the knees and with their forward momentum .... well, just picture calf roping and you have a pretty good idea.
And, it was a new neighbor, so that was our introduction! Thankfully, he likes dogs, otherwise, if he'd turned tail and started running away, can you imagine them chasing him to play - with me bumping along behind them on my butt?!
I think they'll do fine carting. We already know how much weight they can pull and they're only 7 months old!
They've spent all the time since at my feet. I love my boys. All of them - Mike is a great nurse!! (am reserving judgment on the cooking, however!)