There's a real problem with the centre of gravity, in that he looks like he's about to tip over backwards. I think separating the feet a bit and shifting the head to the left could help somewhat.
Much of the edit was just me messing around, but I think his neck could stand to be lengthened a bit, an the selout needs to go at all costs. The edit was quick, and there are still some major balance and anatomy issues, so take it for whatever it's worth.
I played with some other stuff too, but that was mainly a result of the fact that I like dinosaurs and couldn't resist.
He's pretty cute. Keep it up.