Dinosaurs (and worse) in the garden

Every six months or so, I look for a more effective tree-rat repellent. Traps haven’t worked, and most of the recommended repellents have no effect at all. In fact, I think they’re gargling the mothballs everyone has suggested for their aggravation. I suspect that it’s time for more determined measures, so I’ve looked into statuary. Aside from the obvious selection, which the Czarina will not stand for, it may be time for custom work. After all, what says “bog garden” like a custom fiberglass Cthulhu emerging from the muck?