2 year old Boston Terrier walks with out leash but not with
We have a beautiful Boston terrier which over the course of time has decided to train himself... without any lessons ro training he will walk with us anywhere and everywhere.. inside a store outside at a park on down the street. BUT... as soon as I put the leash on him, he freezes right up and no coaxing, no treats, no running past him and excitedly calling him to run with us gets him to move... take the leash off and he "is free" and jumps around all excitedly again. As much as he won't chase other dogs off a leash or wander, we of course are concerned for his safety while walking on the road to the park. Especially now as the neighborhood is getting busier with vehicles.
I do have him used to the collar.. ( that was a similar reaction.. but got beyond that)
Any suggestions would be great,
Thank you.