Wow, this is a great plan and a neat experiment. You probably can't find too many others with your pond chemistry, size, depth, aeration, water flow and mix of forage options vs predators. You will have to see how this goes. I bet the trout will be resourceful and make their own choices. They may choose to chase down the shiners and younger YP? Or they may like the lack of 'pokeys' on the chubs! Not sure how you will know unless you catch and remeasure lengths or find some way to sample belly content on a mortality trout or one that may have been leftovers from a four legged predator?

We have sources of Walleye here in MI and folks from around here used to go across the border regularly but it sounds like the border will be sealed for a bit yet and I don't know the legality of a transport plan.