Yep seen that before here too in a few of my hickory staves only I did'nt try to make a bow from them.Real tiny holes they were.The log those staves came from had been setting in the woods a couple of weeks.That's where and when those buggers moved in.New staves from fresh cut logs should be put immediately either in your house or in a shed off of the ground,and yep old hedge is'nt bothered by that at all.Love that good hickory wood for a bow though.