I use a halti. It seems to really work well on my 2. We call it power stearing. I'm working on just going to a choke chain on them though as I find that some people mistake the halti for a muzzle. The chokes are great but you have to keep them up by the ears and it slides down a lot. Since I usually walk them together I really find that the haltis are a great tool. Especially considering that my son enjoys walking them I like that the halti gives him good control.