They would work, however they may notlast long.
Id stick to good point like (Small Game Thumper, 3R Hammer, G5 SGH, Red Feather talon,) to name a few.
If I was using broadheads Id use a 3 blade (woodsman or snuffer) and maybe dull the point
I was a at a farm store and saw a small 3 blade (like a mini snuffer) I thought that would be a great head for small game.
What ever you choose, think about how your get the squirrel off the arrow. Screw in heads are no problem, but getting a glue on out is harder.