thanks - we obviously don't want anything which will harm the possums, so yes, only animal friendly ideas thanks

we're not sure why there has been the sudden influx of activity - we (and our dogs) have been in this house for over 4 years, and as far as we're aware, there's been no big changes in the landscape lately (ie: no local construction or tree removal or anything obvious which would make us think possums are relocating to our yard...)

our dogs are very much outside dogs - keeping them inside overnight would be unfair on them, as there's no dog friendly areas inside large enough for them to play.