Spring is here, which is nice. However, dont forget squirrels are also getting active, and this is a time when they really like to chew. Its been a long winter and they need to keep their teeth nice and sharp, and your vent makes an excellent tool for this. Dont let your vents become squirrel dental offices, get some Critter Quitters and protect your vents. Homedepot.com or Amazon, or any of our installers.