We have a 2 yr old douglas fir log home ..logs from BC and home in Saskatchewan–very dry. we have been noticing sawdust on the counters/floors in some areas (no holes–just appearing from shrinkage areas between logs) and now see tiny (1/2-3/4 inch) looking millipede type worms…not many…they are dark brown….i don’t believe they are powder beetles. what else could these be….supposedly our logs were treated with borate or some type of insect repellant treatment prior to shipment from B