Things to apply to your pumpkins to deter those squirrel...
1
-Hairspray
-Petroleum Jelly
-Lacquer
-Hot sauce
-Garlic spray
-Vinegar
Pet Hair
Sprinkling some pet hair at the base of your display, in combination with the aforementioned options, may help keep those seed smugglers from approaching your fall arrangement.
2
Sprinklers
No sane squirrel wants to be shot with a burst of water, in fact it may scare them from ever returning again! You could leave the sprinkler on a timer or simply turn it on if you see them coming.
3
Owl Statues
The appearance of an owl in your garden may just be enough to scare any tempted squirrel from entering your grounds. Be sure to put the owls around your yard to send that message!