Motion Sensitivity picking up pets when set for People Only

Same issue here. No matter what sensitivity settings I choose, my floodlight cam is triggering alerts for small animals in the dark 20 feet away. I had no idea I had so many midnight visitors in the garden. Four bunnies, a raccoon and a cat, all in the same night. Thing is, I only want to be awakened if a large two-legged creature enters the back yard, not whenever a possum gambols in the distance, but no matter what I do I get critter cam alerts.

Exclusion zones don’t help because the floodlight cam is 9 feet up and the night critters wander wherever they please. If they came up and mugged directly into the camera, I would forgive an alert, but I need a setting that ignores bunny butt at 20 paces.