Name: Sandy B. Ford River Twp, Michigan UP (Zone 4b) (Zone 4b-maybe 5a)
I definitely wish you good luck, Christine!
Here's another thought, have you checked with your local university Extension Service - they generally have all kinds of info on agriculture-related stuff and maybe someone would come out and check your trees and give you some advice.
Sandy
“Think occasionally of the suffering of which you spare yourself the sight." ~ Albert Schweitzer C/F temp conversion