Nononono... first you get the magic enzyme thingie. It EATS the organic odor-ingredients. It's exactly the same stuff as you'd put in the RV's waste tank, MINUS the nasty deodorizing smell those products have. Carpet cleaning pros use it all the time. I think they put it right into the rug shampoo nowadays. Or it can be a separate step. (I'm outta that biz a LONG time.)

THEN after that all dries you use the Febreze if a smell lingers.

That said, it will never come out if it's down in the pad. For that you gotta peel up the rug, send it out to be cleaned with enzymes, and put down a new pad, and, if it's wall to wall, restretch just like a new install.

But when you peel it up.... that is also when you see how widely the stuff had spread on the carpet's underside, and sometimes you'll see that the backing is rotted as well. Cuz that stuff is hard on burlap. An' it sits and sets..... this is why landlords do not allow pets. Major expense to undo peepee and poopoo.

~Former househiold cleaning service mgr/estimator