They say it "could have weighed up to 200 pounds". How do they know? Are they just guestimating based on modern animals about the same size? Or maybe weighing/measuring a modern beaver and scaling up size and weight?
See the chart in https://phys.org/news/2020-08-dinosaur.html
There's some debate over how useful this is for dinosaurs, but something that died out 10k years ago with closely related existing species is probably easier.