Squirrels Eating Pipes

Cat?

With the cost of the damage they are doing, I'd opt to change that plastic crap out with copper and let them try to gnaw on that for a while.

It really don't take much of a hole for squirrels to get into a space if they want in. You need to go around the perimeter of your house and look for ANY holes in the soffits, fascia, venting, gas/water/electrical access, etc. and seal them up.

Good luck, I've been battling the little bastards for 12 years now. I have 17, 60 year old oaks that attract them like flies to you know what. They come in cycles. Each spring I'll kill 10-15 of the young ones and each fall another mess. Heat of the summer and dead of winter are fairly slow. The most effective thing I've found is patience and my .22 caliber pellet rifle.

They'll chew on electric cables, wiper fluid hose, A/C flex duct, and lead roof jacks to be sure.

We had one develop a taste for patio furniture. Pepper spray on the legs where he was chewing just made him go higher for a bite.

We put out a trap baited with sunflower seeds, and immediately caught the one doing the chewing. Popped him, and no more problems.

There are tons of squirrels around, but it was just that one who liked the taste of chairs.