Jan 21, 2013 - 10:38 AM
Shake Away Small Animal granule is basically fox urine and bobcat urine in a granular form. The idea behind this is that it creates a "Predatory Scent" that scares away animals from certain areas. It almost always depends on the animals and if they are scared of the fox or bobcat "smell".
I normally recommend to use this product as a preventive measure, and not as a corrective measure. All I can say is to try it and see. Also how about using a water hose and trying to spray it out?
Be sure that after the possum is gone, you use a good hardware type mesh screen or something to keep it from going back under.
Traps also work well. The Havahart trap with the Pro Lure works well at trapping, then you just relocate it. Here are the links -