Ημερολόγιο της/του caleb-the-opossum

I know it varies from month to month, but the Virginia Opossum has had a noticeable abundant population near my family's farm. I've noticed they've been drinking my cat's water and have been using the outbuildings as makeshift homes. I usually relocate them to the nearby forest, but certain times they seem to comeback. The wetness/rainfall of the area of my home also must be a factor.