That's a lot of deer :D
I started 1 minute late because I was searching for the pen, and hadn't noticed the sprint button.
I liked the idea and that you prevented it from being repetitive by entering a different phase:
-- a phase that requires the player to be on the pen.
Overall cute art, solid controls, interesting sounds, and alright premise.
I actually disliked the feeding sounds, were feeling like an explosion, and flooded really quick.
I have no strong feelings for the 'story' part of the game but it seems to be serving your purpose.