My couch smells really bad....

I have been sitting on the couch trying to write for a bit right now and something is distracting me.  My couch smells NASTY. Not like kid, animal fur, people smell nasty; it smells like a herd of sheep have peed on my couch......

Honestly I am a pretty clean person and try hard to keep my house clean and smelling mostly good. As much as I strive to keep a clean home I somehow struggle more than the standard person with odd animal smells. Lets be honest I just struggle when it comes to cleaning up animals. For years we had Natures Miracle in the house which was amazing to keep the animal smell mostly at bay.  Since we have moved beyond baby animals in the last year the Natures Miracle isn't around, so a friend suggested white vinegar. Now my house smells like a heard of sheep peed with a back smell of vinegar. I have used bleach wipes and carpet animal cleaner stuff on everything, couch, pillows, you name it. It still smells like a sheep vinegar pee puddle with a antiseptic smell.  The couch is old and animal abused, but no new couch till the cat dies, and I am almost positive the smell is in the couch.
This leaves a question.

HOW DO I GET THE SMELL OUT OF MY LIVING ROOM

I know this wasn't any great kid, family, holiday chat. The smell and the grossness associated with the fact I am sitting anywhere near it is total giving me a case of squeamish heebies.