Do you think my moultrie feeder with 36" stakes will keep hogs from tipping the feeder over?

It should be enough depending on how well the ground holds up, if you continue to have problems you can put a feed pen around your feeder to keep them from getting to it. Thats what I do, but I have my pen set up where it will still throw corn on the outside to attract the hogs....I do still like sticking the pigs too!!!!!!

Best bet would be to drive "T" posts into the ground and wire the legs to the "T" post.

i dont even stake my feeders down ive never had a problem with it but cows on the other hand have tore my feeder up

I have had tripod feeders chained to trees and still had the hogs take running starts and knock the legs off of them. Found legs on the ground and a feeder upside down chained to a tree with the spinner ripped off. I have been fighting this battle for a long time. The only sure fire way I have found if to just put steel eyelets at the top and hang it. The t posts do work pretty well, but down here in Florida I have my feeders in some really muddy places and even they don't hold. The coons "can" get to hanging feders though so make sure to get a spinner with some sort of critter guard.