HELP - Trouble feeding hatchling corns

I picked up two hatchling corns at the WP show a couple weeks back. It was an impulse buy - my son was looking for his own first personal snake, birthday coming up, and you know how it goes. I've been keeping snakes, and other critters, for 20 years on and off and have had mixed results with hatchlings in the past. My first time with corn snakes this young. The snakes are about 7-9" long and the girth of a pencil. I have them for 2 weeks now and have not been able to get them to eat. The dealer claims they ate under his watch but now I'm having my doubts. I have been trying FT pinkies - the smallest I can find in Petco but they still seem to big - but only one shows any interest, and then just slithers away. I've left them in deli cups overnight with the pinkies only to find stinky pinkys in the morning. I will try live pinkies when I have a chance later this week - its 30 minutes away to the closest source. Any suggestions?

Try cutting the limbs off the frozen thawed pinky and place it in their mouth. I'm sure they will take it. Next step up would be limbs off fuzzies.

So you're suggeting feeding only a leg, right? not the body without the limbs. and do i force their mouth open by retracting along their lower jaw.

Correct. Offering an arm or a leg as the actual body may be too big. You can open the mouth exactly as you said.