I decided a while ago I wanted a "Kroot Hound" to go with my Mechanicum Menials counts-as Kroot. I have one of the old Necromunda all-robot Cyber Mastiffs back in Austin, which my initial thought. But then... I had an opportunity to get one of the exclusive FW organic cyber-mastiff models, and I jumped on it. I ended up giving him a color scheme similar to an English Mastiff, and let the bloody, worn skin around his sutures and augments tie him in with the rest of the Menial unit. I gave him bright yellow eyes to give him a slightly more unnatural look.