As bobby mentioned their bellies are probably still full of yolk. Have they had their first shed yet? I normally wait 7-10 days before attempting to feed my baby rattlers. I am assuming you are attempting to feed day old pinks? live or frozen/thawed?

if frozen thawed

If you are getting a good strike and not just a bunch of little half hearted strikes "hard to explain" Then just drop the food source and put the lid back on the deli and leave it for about 20 minutes.

If they have not taken it pick the food back up with hemos and try tease feeding "tapping the tail will work" and repeat above.

If live day old pink

just throw the pink in the cup put lid back on and leave it over night.

Start with that thenwe can go through other tips such as washed pinks, slitting pinks, braining pinks and scenting. However the cup feeding normally works pretty well
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Dan S.
Crotalus & Company
Venom-Center
Wisconsin Reptile Community