Bite Counters

Curious if anyone has feedback on using a bite counter (device worn on the wrist that tracks how much people eat based on wrist action)?  Does a Fitbit have a readout for wrist action as well as steps taken?  My computer sits next to a window where our chickens make multiple laps around the house from sun-up until sun-down.  I wonder what a chickens' Fitbit would read at the end of a day knowing if we traded places, I'd be at goal easy-peasy.  (edited for clarity)