My BCI is 20 months old. I have him since he was 19 months old. That makes me with 19 months experience. And no experience needed about this matter. Its simple. My BCI never burrowed when he had a hide and burrowed when i took his hide away and stopped burrowing as soon as i gave him his hide back. There must be other BCI,s like him. I,m just saying its wrong to generailze a statement about boas saying they ALL would burrow even if they have hides. Such a statement would be true for Dumerils boas and not boa constrictors.