Excellent rendition of an Ankylosaurus! You did a nice job on the pose/anatomy and the detailing of the scales and bumpy back plates. Lovely, earth-toned paint work too!
Alas, I've had several of my toys and sculptures mutilated over the years by the predations of giant felines like Tripawaurus--no amount of protective spikes, plates, etc. deter such creatures, indeed, those are often the first things to get chewed off by their kitty teeth.
On a related note, if you happen to have a Dollar Tree store near you, they have these cool little plastic glow-in-the-dark skeleton models, including Ankylosaurus (and you get two different dinos in each pack, which is a pretty sweet deal for a buck). Even if you don't want them as-is, I imagine they'd make good armatures for a dinosaur sculpture: