Hi Stephanie! I would start by setting out rat traps with a little peanut butter. Then, you must seal the holes where the rats are getting in. Seal the holes with something like steel wool because they cannot chew through it. You must block holes as small as a quarter since rats bodies can squeeze so small. If that fails, you may have to hire a professional. Dealing with pests is no fun!
Just one bite is a great rat / mouse poison. Can get it at some sources online. Otherwise only at stores that sell farm products. Not allowed to sell in regular stores.
Definitely find out where they're coming from and seal up the tiniest of spaces. Whether to use poison or traps is more of a personal choice. Good luck!
Put a teaspoon of peanut butter and a teaspoon of dry oatmeal into a paper napkin and mix it together by squeezing it. The napkin absorbs the oil, leaving a sticky lump that you will mash onto the bait tab of your trap. You don't pile it on, just mash it so it's on there tight so they have to work to get it off. This motion springs the trap. Put your trap next to a wall...they seem to run along them, and if you have something to lean against the wall making a tunnel with the trap inside, they also seem to prefer feeling hidden. Taught to me by a county health official. It worked within the hour.
Also seal up all the holes coming into the house...even the smallest hole can let in mice and rats. If you have pets, never leave food in their bowls after they've eaten. A lady had to replace part of her bathroom floor and discovered a stash of dog food and other stuff the rodent had gathered to its nest.
I've also used a product called Havoc, bought at the local co-op, used by farmers. The problem with poisons is that the rodent could eat it and die inside your wall, or you could always wonder if you got them. The only sure way to know for sure is a trap.
put some ammonia on a rag and place it where you think it is
If they'rein yoir house, they own it now. Move out.Get an exterminator that works on sealing the house from the outside, the weak areas where they're entering . They have bait boxes at hardware stores that you place outside the home and fill with poison.Some farm stores sale coyote pee.... yes pee in a large bottle which may deflect rats from entering the area where you pour it. They are predators of rats.