How do you get the piece of food to gloved hand? Do you use your barehand to place it in gloved hand if so your redtail has probably seen you do this and knows that's where the food comes from. I've had redtail stomp there foot on the glove looking for more food because they know that's where it comes from just seeing you take food from a pouch with barehand and placing in the glove they can associate the barehand with food. They are not dumb birds they can connect the dots easily.