Will your dog be okay if he ate several small garden millipedes that were in his food?

Garden millipedes are not toxic to dogs, so your dog should be fine. However, it is unlikely that your dog would eat several millipedes intentionally. Millipedes have a foul-tasting secretion that can deter predators. If you are concerned about the millipedes in your dog's food, it is best to remove them before feeding your dog.