Depending on your particular requirements, you can find animation files for your dinosaur model in lots of sites
A wide range of 3D models and animation resources for your dinosaur are available on 3D model markets like TurboSquid, Sketchfab, or CGTrader. These marketplaces also frequently include animation files that can be attached to the models.
Online resources that are available for free include OpenGameArt.org
Great having you and have a nice day