[Maximo]

Do I remember correctly that Wallee likes being outdoors in your yard?

It is surprising that Summer's company has not encouraged Wallee to like walks.

I think I would try not forcing him to go walking. Maybe if he sees you taking Summer out and enjoying the process he will start to think he is missing out on something.

Don't chase him to put his harness on. Be nonchalant, ask him if he wants to go, and if he runs away, say happily, "Okay, maybe next time," or something like that.

When you do take him out, be super patient. If he wants to stop, let him. Always keep your feet forward in the direction you want to walk. Wait a few beats and take a step forward happily saying, "Let's go!" If he doesn't move, don't be upset. Just stop and repeat.

If you talk to him a lot when you walk, try being almost silent. If you are usually quiet, try talking to him, pointing out interesting things on your walk.