First of all, very nice use of colors. The yellowish brown brings the main focus to the interaction between the dinosaur and the girl, while the pops of red draw your eye up and down the composition.
Also, the use of perspective may not be a 100% correct but it passes for well enough overall. And I don't know if this was intentional, but the party hat of the girl and the talon of the dinosaur both come together in a point that draws your attention to the floor of the cage.
The shadows of the dinosaur in the cage and especially of the cage itself aren't dark enough to really register as shadows, but I didn't know whether that was intentional or just not wanting to draw too much attention from certain areas of color.
However overall I really just enjoyed the piece. It looks as though the girl is offering a drink to the dinosaur and piece of bone to play fetch with. The style you use really suits the work, and complements it as opposed to working against it. Solid stuff.