>>My boa is currently 18" SVL, 21" total, he was born on July 11th, 2008.

I would first try a crawler mouse, they seem to prefer mice over most available food sources. These are alive and have fur but yet are not at a stage where they will damage the snake if left over night. The crawl around but yet will not bit your baby snake.

Make sure a secure hide box is available as well. Keep the snake at the proper temps as well. Low 80's (to 84).

Keep us posted to try more options.
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Roberts Realm Of Reptile Research
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Thanks,

I opened my mouth and out flowed a melody black.