I have Tactical Dogs. They are short legged, each has their own camouflage pattern, and they will do anything for a Milk Bone (no affiliation). Both of them have quadrupedal drive train systems, good optics, great sound sensors, and are equipped with strong burgler repelling sound producing devices in both Arf and Ruff languages. They are both equipped with marking devices which are able to be detected by a well trained nose, but are not detectable by optics under most conditions, at least after the marking material has dried. Both respond to voice command although there are apparently some computer glitches in their voice recognition software. All their software is kept secure under a hardened calcium armour plating. The Tactical dogs do have a built in "clap on-clap off" switch built into their software program. It was a patch applied to try and solve some of their voice recognition programming glitches.