I finally think I have won the battle, I tried everything I could think of, the slingshot with glass balls sort of made them wary but they still kept coming back even though I hit them with the slingshot occasionally. My big victory was about a week ago when the dog had one up the tree and with my spotlight on it I started banging on the corrugated iron I have wrapped around the tree with a lump of wood. Each time the possum went a bit higher and stopped I started banging on the iron again. I kept this up till he was right at the top of the tree and waving about on the thinnest of branches. I kept banging for a while and went back inside and since then the dog goes outside hoping to find a possum but obviously they have moved on because he comes back inside without me having to chase him . Victory at last finally I hope
