I do more or less the same thing. I have a special bucket and when the birds see the bucket they know it's treat time and come running for treats.I would walk to the west and dont put it past a human to take your flock i would put out a game cam also in the future when I feed my flock no matter if its feed or treats i always call them i say chick chick chick over and over till im done feeding them that way they associate my voice saying chick over and over with food/treats and when ever I say it they come running