Babies aren't going to eat pinkies. They are literally my assist feed option only for fresh non start hatchlings. Even so I generally assist with a mouse hopper. I agree with all the advice above so I won't repeat. But pinkies are really never a Food option unless you have an extremely small hatchling(generally twins fall into this) or a non starter hatchling. Also babied have no idea what ft is. I'm sure if you tried a live small mouse or a weaned/hopper mouse hed grab it right up. LeAve him completely alone and offer another meal in 5 days. Also Get a digital scale and a notebook. Take weights and write all of his feedings, refusals,sheds,defections, odd behavior etc. This will be the difference between the baby getting to deaths door and you being able to do something about it in a safe amount of time. If you ever have to go to the vet bring it with you and your vet has a complete history.