We trapped a bobcat kit in our yard three years ago, it had been abandoned by its mom (she was likely struck by a car in this area), but five days of no mom and this thing yowling in the yard, and we got a live trap cage from the local wildlife center and took it in. Sadly, it didn't make it.
But good lord that thing was ANGRY.
I have a 25# beast of a cat (wears size S dog collars. Not XS. S.), and he about crushes me in the middle of the night by curling up on my chest. I can't imagine 40#.