Biggest suggestions I could make is to not have him stop chewing when he sees the squirrel. Just have him slow down. Right now, it looks like he’s chewing, but then as soon as he sees the squirrel, there’s nothing in his mouth.

As for the reaction. He’s kinda fluttering his eyes a bit while chewing and that’s how he ’spots’ the squirrel. And when he ’spots’ the squirrel, he goes from content to angry in one gesture (his head moves forward and brows crossed).
Give him a beat to react first. Remember the internal monologue. He’s happy, then sees the squirrel, then has to think to himself “what’s that? oh… a squirrel.. “nature” shit. Well fuck that! My nuts!”.
And through his thought process, we get to see in his face the mental path he takes to arrive at ‘angry’. It’s not just a straight shot from happy to mad.

Acting, man! Don’t just ‘DO’. You must have a personality.

The mechanics are all there. I’m only critting your acting choices. So good work! Keep it up!