Can Dogs Eat Apple Pie?

Yes, as long as it does not contain the following harmful foods.

Avocados
chocolate (all forms)
coffee (all forms)
onions & onion powder
garlic
grapes
raisins
macadamia nuts
alcoholic beverages
moldy/spoiled foods
salt
fatty foods
gum or any candies made with xylitol
tea leaves
and finally raw yeast dough

yes of course they can

If the pie filling contains any nutmeg, it could kill them. Not all pie recipes call for nutmeg, however.