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When threatened or crushed, stink bugs emit a pungent scent often described as smelling similar to cilantro. However, some people say it can smell like sulfur or ammonia. The scent is produced by a gland on their abdomen and some species can spray the scent too.

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.

The number of treatments required to eliminate bed bugs varies depending on the severity of the infestation. Most cases require two to four treatments within a three- to six-week span. However, a small infestation might only need one inspection and one treatment visit. In contrast, severe cases or large homes may require an ongoing plan with quarterly, monthly, or semi-monthly visits from an exterminator for up to a year. To get rid of bed bugs as quickly as possible, it's best to investigate and treat them at the first sign of an issue.

You can easily find sprays that claim they are safe for pets and kids. However, we’d rather not use them in our own homes if we’re worried about pet safety: They still include pesticides and other chemicals, and are best avoided in any food prep areas like the kitchen, or any spots where children and pets may place. That’s why sprays didn’t end up in our suggestions for the safest options.