I would like to design a robot

I would like to design a robot to help with herd management (goats/sheep/etc) on the farm. Something that could travel with the herd, like following embedded RFID chips or bluetooth beacons attached to ear tags, and report back on sicknesses, births, animals in distress, etc. I'm thinking some of the camera recognition bits could be programmed to detect several of these situations with the help of an auditory monitoring setup. Also, there could be a herd defense mechanism to detect and deter predators with sight/sound. Coupled with strong wifi access point(s) around the farm, and some sort of autonomous charging when they animals and robot return to the barn for the evening, I think this could be viable. I'm working with an electric wheelchair base that handles off road terrain fairly decent (I'm considering changing to some form of 4x4 or 6x6 chassis with more ground clearance however), and has the battery stamina to last for the day, but right now I have the older v3 board and am looking to upgrade to the v4.