Thanks, therozypozy.  Yes, I spoke to the vet regarding this, as I too was concerned.  He said that as long as they were not pulling, and as long as they were not running EVERY day on pavement, it would be okay.  They will be 1 year on 9/20.   We run about 3x per week...sometimes 4, and, although we WERE running 40 minutes, after taking their temp the other day after 20 minutes and getting 105, that's our cut off.  I might even take it to 15 minutes.  I will DEFINITELY hose them down and bring squirt bottles.  I bring water with me. It's called the Gulpy.  Cute design....but neither of them will drink from it, or take any form of water.  We do stop in the middle of the ride, actually 10 minutes exactly, at the park. It has fountains for people and dogs.  Though we carry our own water for ourselves and the dogs, as I said, they won't take it......I was trying other options, (Perhaps the water tastes better licking it from the fountain bowl!)   You make a beautiful point regarding ice and the tongue.    It actually makes perfect sense too.  Veins dilate and become more prominant in people so we can lose some heat.  When we get cold, they constrict to help us stay warm.  I can see the point.  For the same reason, they say not to put COLD towels on the dogs, as it constricts the veins and holds the heat in.  So, whether or not it causes bloat is not really at the heart of the matter.....it's possibly inhibiting loss of heat . I never knew the tonge was a major place dogs lose heat!   Thought it was like people, groin, paws, head, tummy, etc.   Interesting.   I agree about the growth plate thing, but my dogs run, jump, clobber each other and run into things nonstop!  The bike is EASY compared to what those two put each other through!!    I understand the jog or run is constant pressure.  We don't bikejore though at all  They run at a heel position.   They have only pulled a couple of times......running after prey and avoiding or trying to pounce on a yappy dog that ran to great them!  That exchange didn't end well!  I ended up on the ground! Bike and pups were fine though!  Thanks for all your info!

 @Jena!  Have you received your WalkyDog yet?  I'm so curious to see how you and Stella enjoy it!   Keep us posted!

 Jena,  Yes.  I understand.  6 months is a little young.  I just started with mine and they are almost a year.   We have only biked a total of 5 or 6 times.   It's just been way too hot, and I've been working a lot this past month.    I think it would be okay to get it now, set it up, and walk her with it.  At least she would be used to the bike.    I also think that if you let her run once around the block with you on the bike, and Stella in a heel position....NO PULLING, it would be okay.  Talk to the vet though just to make sure.   Certainly NO extension!   Since my major fall, I took the extensions OFF, and will only bike with ONE at a time!   The extensions just give a little too much freedom.  They cannot run in front of the tire, but they can certainly run into the tire and push it over....so, you can't run over the dogs, but the dogs can run your bike down with you!  Lol!

When the dogs are at a trot or lope, it is totally safe to have them together.  However, in the initial run when they are both at 100%, if something triggers them, things can turn dangerous quickly.  Kaido the other night got spooked by his own shadow!  He came to a dead halt.  I came off the bike and straddled, almost falling.  I have a wonderful bruise STILL.  It took me a bit of time to coax him into running again.  He is such a chicken!   We rounded a corner, and the shadow/lighting was just PERFECT to give a perfect full body shadow of him to his right.  That nearly did the poor pup in!   Doggie physologists, here we come!  Lol!