Rats do indeed give off a smell in more than one situation. Rats have very high water content and need to drink lots of water every day. So if your yard has a pool or a water feature or even just a leaky hose or damaged plumbing the rats will immediately go to that area and build nests near the water. If there is a natural water source like a ravine behind your house sadly rats will be a common and regular event but there are things that can be done to prevent them from entering your home.
If you are dealing with a rat infestation or have suspicions thereof, contact Rat Pest Control for a fast and effective complete eradication.
Mice tend to smell like urine and must, which is a dusty old smell that makes the air hard to breathe. Rats also make air hard to breath with their dander and dried feces but will also give off a strong ammonia order that can be easily noticed right away. When they die, they will defecate and urinate whatever is left and begin to rot and give off a horrifying smell. If this happens in your attic or your walls you will likely see red stains on the outside of the wall after a few days. They will rot for a very long time in the wall and will make the house impossible to live in. This is why rats on the inside cannot be treated with poison, it will cause them to die in the walls. The better option is to use snap traps with bait to catch them so they die outside of the wall.
If you want a commercial treatment because your domestic attempts have failed this is likely what will happen. The technician will do an inspection of the outside of the house for entry points the rats may be using to get inside. If he inspects inside and finds signs of a lot of rats he may decide to install rat one-way doors instead of sealing a hole. This allows the rat to leave the house but them locks them out with an immovable door. The technician will use high-quality snap traps with bait to ensure that any rats that don’t leave will not die in the walls and cause issues like terrible smells and expensive renovations to get out the rats from the walls. They will then go outside and deal with where the problem started. The tech will lay down large tamperproof weighted bait stations that will be filled with commercial grade rodenticide. This will take care of the rats outside.