Hello! Thank you so much for your purchase!
Most features in the that beta version are very buggy and don't quite work very well. Tiny Dino was my first big project and I wasn't as experienced as I am now when I released that version. I have been working on rebuilding the game from the ground up to fix most of the problems with the old build and get it ready for a brand new Beta build by the end of May.
The feeding not working is actually something I had not encountered before, but hopefully will not show up in the next build.
I'm so glad you are enjoying it so far and hope you'll enjoy the next build just as much if not more!