Homeowner said ALL squirrels must go!

Nice shooting! A pellet will wreck a feeder. My feeder and suet feeder are on 1/8" steel, plastic coated cable and spans 42'. I have yet to see a squirrel on the feeder after several months,.. or even the line. The cable is attached to a tree at each end and about 8' off the ground. It should pose no issue as long as they can traverse the 21' of cable. It has me stumped. :( All of my hits come from them running around the yard.
 
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