If you haven't tried scenting the pinkies with chick down I would try that. Some other things I would try, and I would only use assist feeding as a last resort. You really need to make the snakes mad when trying to feed them. Sometimes that means using quite a bit of force on the back of their necks, and with less force on their tails. I do not like touching their heads as this seldom works in my experience. You could also try lizard scent, but that rarely works. Chondros are known for being tough to start, so don't get too discouraged because everyone goes through this.
Also, my experience has been that newly hatched chondro does need to eat within 6-8 weeks. If they do not, they have a good chance of starving to death.
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Mike Bair
Chondro Dreams
