Exterminators in the N.O. area - large rodents in the attic (3-month update: Rats gone!)

Merl said

If it is squirrels make sure you get the electrical wiring checked they will chew on it and any duct work for the HVAC system.

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Good point. Not trying to scare you but also rodents do chew electrical wires. Some on the wiring to them have a "nutty" smell and they will chew the wire. I know from dealing with an incident at work with rodents.