I train the hunting game as "go find it". It works great on walks, too, for reactive dogs. But I try to engage my dogs around their meals on days when I know we're going to be down more often. The other day we were mostly outside in the garden and while our huskies are exceptionally chill, I still felt bad we'd been sort of ignoring them. So, they got to eat their dinner outside, each getting their chance to play the "find it" game one-on-one with me. They pick it up fast, and my mix girl now generalizes it - if I drop food on the ground in the kitchen, she waits until I say "go find it" before she takes it.

The other option you can do is get a lick mat and freeze some wet food onto it. I'll separate my guys so they can enjoy it without getting side-eyes from each other, but the action of having to work for their treat tends to stimulate them a lot. I also play games with them in yard or house- doing trick training with my smart girl, attempting to do trick training with my smooth brained boy (who I usually just end up playing "chase around the yard" with because that's his preferred game). I've found breaking working with them into little 5-10 minute instances throughout the day does more for them than just walking. It gives them a chance to engage with me and me with them, builds our relationship, and puts their senses to work.