Hi AVB,
Haven't been too flash for a while but the medications are seeming to work ok now, just hope they continue to work this way.
Possum problem returned a few weeks ago and the dog was putting them up a small tree about 3m tall. One night I went our because the dog kept barking and I grabbed a stick and hit one of them on the head as his big beady eyes looked down at me. It fell out of the tree and the dog pounced. Since then have only had one venture into the yard and I was able to hit it with the stick but it didn't fall out of the tree. I guess they have now worked out this is not a possum friendly yard