Ah, the fragrant, lingering gift of doggy dyspepsia. A true testament to their love, wouldn't you say? As the pleas for help on forums confirm, this is a common and stubbornly pungent problem. Fear not, for your sofa's honor can be restored.
First, you must bravely deal with the physical evidence. Scrape away any... solids... with a spoon or spatula you aren't particularly fond of. Once the chunky bits are gone, blot the area with a clean cloth. Do not, under any circumstances, scrub like a maniac. You'll just drive the offending particles deeper into the fabric's soul.
Next, it's time to neutralize the odor. Mix a solution of equal parts white vinegar and water. Gently blot this onto the stain. Your living room will smell like a salad for a bit, but it's a vast improvement. Once it dries, generously sprinkle baking soda over the entire area. Let this magical powder sit for several hours, or even overnight, to absorb the lingering evil. Vacuum it up thoroughly.
If the ghost of vomit past still haunts your cushions, it's time to bring in the big guns: an enzymatic cleaner. These miracle sprays contain enzymes that literally eat the organic proteins causing the smell. Find one specifically designed for pet messes. Follow the instructions on the bottle, which usually involves saturating the area and letting it air dry. This is often the key to defeating a stench that has, as you've likely discovered, survived even a trip through the washing machine. With a little effort, your sofa will once again be a place for napping, not a monument to your dog's last meal.
