Sure, dryer vents aren’t very large. Neither are newly-born raccoons.
If you’ve found that raccoons have made a nest in your dryer vent, don’t panic. It happens.
We’re all about doing household projects yourself, but raccoon removal is best left to the professionals. You do not want to wrestle a rabid raccoon. So, the first step is to call your local animal control.
After the critters have been cleared out, you’ll want to thoroughly clean the dryer vent. Most of the time, the nesting materials collected in the vent are going to be highly flammable. Plus, it’d be a good time to clean the vent out of any lint buildup anyway, as that could also start a devastating fire.
A good preventative step is to install a mesh vent guard made of either steel or even copper. Plastic or aluminum guards are easily destroyed by even small animals like squirrels and chipmunks.
Good luck!