New kongs always smell like rubber. This doesn’t seem to deter most
dogs but if your dog is particularly turned of you can run the kong
through the dishwasher a few times. Kongs are dishwasher safe, so any
time your dog’s kong develops an odor you can run it through a
dishwasher.
If the odor persists, try dumping
about two or three tablespoons of baking soda in the kong, holding it
over the sink, covering the small hole with your finger, and dumping
white vinegar in. After that, let the kong soak for a few hours in
baking soda water and then rinse well.
