These dogs are Belgian Shepherds – specifically the Malinois breed.
Belgian Shepherds are known to be highly intelligent, alert and sensitive; they are typically highly trainable, with a strong guarding instinct. Hence many are desired for home protection and they are very well suited for security services.
While achieving great jumps they appear to be flying! Check ’em out:
https://youtu.be/zq2jJ_B8_yc
DCG