Hoppers are not weaned from their mother so it will be difficult to maintain them without their mother.
They may eat a bit of solid food but might fail to drink water on their own.
Offer a swallow water dish and some dog food and you will see.
3 weeks is the age you are looking at as far as being weaned and eating and drinking own their own.
I am curious how big is you BP, hatchling straight out of the egg will take hoppers and they usually quickly move to a bigger size.
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