Our ocelot gecko had some problem with a dusted cricket when he was very young (he vomited it for some reason) and since then he won't even look at crickets that have been dusted with calcium and vitamins. We are trying to compensate by giving him small amounts of vitamins/calcium with a little water on the tip of his nose, so that he'll lick it, a method he finds very annoying.
I have a pretty hard time looking for something I could feed to the crickets so that they contain enough calcium and vitamin D3. The only things I was able to find in my area are variants of dry calcium vitamins mixes for dusting.
Are there any alternatives I could use to make sure that my gecko will get all of the nutrients he needs? Such as a way to feed crickets naturally? I try to feed them cheese or curd but that won't solve the vitamin issue.
Or does anybody have similar experience with a gecko rejecting dusted insects, and know of some way to make them more appealing so that he'll start eating them again?