This is a discussion on another board. I'd love to hear a broader sampling. Please respond with the age your dog was chipped, what type of chip was used and did it migrate. My personal and very unscientific opinion is that a chip implanted in a rapidly growing puppy has a greater likelyhood of migrating. It would be nice to actually get some data about this. My dogs.... Both have Home Again chips. One done at 2 years and the other at 6 months. To this point, neither have migrated.