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Animal Fencing FAQs, answered by experts

It can be difficult to know what type of animal is in your attic until you see it. But several clues can help you narrow down the suspects:

  • Sounds: Smaller animals like rats and mice make scurrying and tapping/gnawing sounds. Larger animals like raccoons and opossums make louder clambering noises. Also, note when animals are noisy: Squirrels are active during the day, while rats are busiest at night.

  • Droppings: Rats and mice leave small, rice-shaped droppings (the rat’s version is significantly larger). Bigger droppings belong to larger critters like raccoons. As long as you’re not squeamish, an image search can help you identify what you’re seeing in your attic.

When in doubt, take photos of damage or other evidence and show them to an experienced pest control pro.

A squirrel in a chimney may sound like gnawing since they like to chew through a wide range of materials. You may also hear a persistent scratching sound if they’re trapped inside and unable to get out themselves. Other evidence of a squirrel in your chimney includes holes on or around your chimney as well as droppings or damage to roof shingles or wiring.

When baiting an iguana trap, several items should be avoided. Do not use poisonous baits, such as those intended for rats or mice. This practice is often illegal, is unlikely to attract iguanas, and poses a significant risk to pets or other wildlife. Additionally, avoid using herbs, fruits, and vegetables that are toxic to iguanas, such as fresh sage, rosemary, avocados, and eggplants. While ripe fruit can be an effective bait, be sure to remove any pits or seeds from fruits like apples, pears, and peaches, as they are highly toxic. Finally, steer clear of citrus fruits, which act as a natural deterrent.

Yes, in some cases if your damper is left open, animals can come down your chimney. In these instances, it’s more likely that they have fallen in while looking for a safe spot rather than entered your house intentionally. Leaving your damper closed or installing a chimney cap can prevent animals from coming inside.

Whether dryer sheets can keep squirrels away is a bit of a mystery because the evidence is entirely anecdotal. Many households claim to have success with using dryer sheets for keeping squirrels away by placing them throughout their attics, yards, on a clothesline, and any other area where squirrels like to run through. Squirrels do not like strong scents, so if you try using dryer sheets, the ones with the strongest scent may be the most effective.

The Cornell, WI homeowners’ guide to animal fencing services

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