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.
Its 105 degrees here.
We aint spending no time outside LoL