Implantation of microchips in pet animals nowadays is the most commonly used, most sensitive and most specific method of marking and identification. A microchip is a passive electronic device that, after scanning, sends a signal to the microchip reader, whose displays a unique 15-digit number code. In the Republic of Croatia, the law requires microchipping of all dogs at the age of 3 months, and the microchip should be applied to the left side of the neck, under the skin. Some recorded side effects that may occur during microchip implantation are: unprofessional implantation, formation of neoplasms, microchipping with multiple microchips, microchip failure and damage, and microchip migration. In this research, an analysis of the available data on the migration of microchips was carried out. By analyzing the data of 999 cases, 188 (18.6%) dogs with microchip migration were found. The most common region of migration is the antebrachial region, with a frequency of 27.7%, while the least amount of migration was recorded in the antebrachial region (1.6%). The breeds with a higher frequency were the Belgian Malinois and the German Shepherd. Regarding to the sex, age, size of the dogs and body conditions, the results showed no significant differences between the groups. The obtained results are in accordance with the data known so far. Although the results do not show statistically significant differences according to many criteria, we consider this research a significant contribution to insight into the frequency and possibilities of chip migration in dogs.