Years ago, when our current dog was ready to jump out of the canoe after a beaver, I decided she needed to learn to lay down in the canoe and stay there. It took a while but now she eagerly jumps in and lays down on a piece of yoga mat I cut for her. It gives her a "spot" and it keeps her from slipping around. We've had this arrangement for a half dozen years now and it seems to work. Without all her moving around, it makes for a more pleasant paddling experience.
That's all for now. Take care and until next time...be well.
snapper