Like a rent-controlled apartment in New York City, rodents know a good thing when they see it. If they've found a cozy nest inside your home, they will set up camp and stay there, leaving only to forage for food and water. As long as they have a warm place to sleep, raise their young, and continue access to water and food, they're going to stick around.

It is very difficult to remove a colony entirely without using some kind of insecticide. However, some treatments are safer than others. Diatomaceous earth is a non-toxic powder application that creates barriers that insects can’t pass through. Some pest control companies offer liquid nitrogen treatments to freeze out termites without using pesticides. Some chemical treatments are safer to use around plants, water, and wildlife than others. Bait stations are generally less damaging to the environment than sprayed termiticides.

Seeing a rat or two isn’t uncommon, especially in mild climates. That doesn’t mean they are actively a danger to your home. The problem is when you start seeing rats regularly in your yard, there’s a good chance they are also looking for ways to get into your house or other buildings. All they need is a small hole or gap, and they have a new place to nest -- which is bad news for you. Stay cautious if you start seeing rats in your yard all the time. 

To find a quality professional and avoid pest control scams, it's important to do your homework before you hire. Start by reading customer reviews or getting a direct recommendation from a friend, neighbor, or family member. Once you have a shortlist of top-rated companies, verify that each pro is licensed and insured. It’s also a good idea to get multiple price quotes from vetted pros to find the best deal.