
Based on the limited context provided, which mentions a specific incident of a dog vomiting, a comprehensive answer requires drawing from general professional knowledge on leather care and odor removal.
To effectively remove dog smell from a leather sofa, a multi-step approach is recommended, focusing on cleaning, deodorizing, and conditioning the material. The first step is to thoroughly vacuum the entire sofa, using a soft brush attachment to get into all crevices and seams. This will remove loose pet hair, dander, and dirt, which are primary contributors to lingering odors.
Following the vacuuming, create a gentle cleaning solution of equal parts water and white vinegar. Vinegar is a natural and effective deodorizer. Lightly dampen a soft microfiber cloth with this solution, wringing it out so it is not dripping wet, and wipe down all surfaces of the leather sofa. It is crucial to first test this solution on a small, inconspicuous area of the sofa to ensure it does not cause any discoloration or damage. Do not oversaturate the leather.
For more persistent or deeply set odors, baking soda can be an effective absorbent. Sprinkle a light, even layer of baking soda over the sofa's surface and let it sit for several hours, or even overnight. The baking soda will absorb the unwanted smells from the leather. Afterward, vacuum it all up carefully using a brush attachment. For specific stains or smells from incidents like vomit or urine, an enzymatic cleaner specifically formulated for use on leather is the best option, as it breaks down the organic proteins causing the odor. Always follow the product's instructions and test it on a hidden spot first.
Finally, after any cleaning process, it is essential to condition the leather. Cleaning agents, even mild ones, can strip the leather of its natural oils, leading to dryness and cracking. Apply a high-quality leather conditioner according to the product's directions. This will restore moisture and suppleness to the sofa, protect it from future damage, and often leave behind a pleasant, clean scent.


