Heeling

Question
Hi

I am begining to train my lab to heel properly quite franky after trying a head halter/body harrness/choker chain and just a plain collar I still find she pulls, So I've taken to walking her with just her regular collar that carrys her I.D tags. I did a heel exercsie with her today that went rather well in the yard and around the block which included bribing with treats but worked non the less, I am fairly sure I can get her to perfect this in a few weeks but was wondering how to carry this over to when I walk her with my other too equally pully dogs? I want to work only with her first and then the other two but also want to walk all three together as it saves time, thanks for any tips

Answer
I have had nothing but bad luck trying to walk more than one dog at once.  

Much of walking one dog at a time is technique, refusing to tolerate pulling.  Pulling the dog backwards may work as well as anything each and ever time the leash tightens.  Stopping or reversing directions also works well.