


What is...chewing? on my stuff?
I live in Minnesota, Twin Cities suburb. I got a new AC and furnace last summer. Part of the replacement was installing this plastic base for the condenser. After the winter, I started noticing these marks appear on the base of my AC. I was pissed, but figured oh well, it's not meant to be decorative (but it was brand new! grr). Anyway, today I noticed similar (though smaller?) chew marks? on my Timbertech composite decking that I installed last summer. Now this one makes me really pissed. The marks are about half the size (width, depth and length) as the ones in the AC base, so maybe not the same, but they look very similar. I ran out and checked my AC base and saw 2 to 3 times as many marks on it as a month ago.
But what on earth is doing this? And how can I prevent it, at least on my deck?