Standard drywall repair generally is not difficult with proper tools, materials, and experience. Carefully cut and save the hole for repatching later ( do not use a hammer ) ; saves lots of money and time.
Some spray on textures and other fancy textures can be a real challange.
Matching faded paint can be tough.
If really dead, then the mouse will dry out soon ( days ? ) and the smell should go away. If it is still alive or if the mouse moved its whole family in...then there is a bigger issue.
Is it making noises at night when the lights are out and the house is quiet ?
At 105 degrees, that's likely the reason the poor rodent died.
Just leave it and the heat will eventually just cook the stink out of it.
Spend as much time as you can outside the house for the next few days, shop, eat out, visit friends. The odor will fade pretty quickly next week.
You can go the the trouble and expense of tearing up your walls but the mouse/rat smell will be gone soon and it might be hard to find it even after you tear your house up.
Oh and while you are out buy some scented candles.
Alternatively, a skunk may have sprayed under the house.
If it is a mouse or a rat, suffer for the next 24 hours or so. Then, the odor will go away.
Or, you can tear the wall apart.
It’s up to you!
Have you changed your underwear lately?
If you hurry there might be some good eatin’!
Nuke the house from orbit. It’s the only way to be sure.
Find some lavender scents to mask the odor until you can fix it. Don’t ask me why it works.....but it does.
My daughter had what we think was a dead squirrel in her all causing one bedroom to smell horrendous. You felt really sick to your stomach going into the room. This was 5-6 yrs ago so I may be incorrect on what was used. I had a friend who owned a pest control company and he told me to take cotton balls....soak them good with witch hazel(pretty sure that was it) and throw them around the room. Within a day the smell was much less and before we knew it we hardly noticed anything.My pest control guy said “try witch hazel..if that doesn’t work we may have to cut out the wall”...fortunately it worked. Good luck..
If you don’t wanna tear down a few walls trying to find it then you just have to wait for it to dry up and stop stinking. Hope it is a mouse cuz it’ll dry up a lot faster than a squirrel.
Look around for any empty wine bottles.
If you find one labeled “Amontillado”, you got a problem!
As one who has drilled holes in walls looking for tiny mouse corpses. The stink is usually bigger than the mouse, and it’s easy to come up with nothing but a bunch of holes all over.
Not sure what part of TX you are in, but as hot as it is in TX right now, the critter should dry up pretty soon.
I tried the ‘just lt it rot’ strategy once. A few weeks later I was treated to a swarm of flies that rivals any Hitchcock movie. I’m talking five pounds of flies (after
I vacuumed them all up), and I had to evacuate the house for a few hours.
I strongly suggest finding the animal and getting rid of it.