1 - the BG will eat it but they do make higher protien content fish pellets that will get you better growth rates on your BG.
2 - I would start with a 50 lb bag and only feed what they will eat in a 15 minute period. Buy more pellets as needed. Un eaten pellets will add to the nutrient load of your pond, also fresh pellets are much better than old ones so check the date codes too.
3 - Pounding a steel post in the ground next to your feeding area and bang on it as your feeding que. Our BG re-act positively to the sounds of just footsteps on our dock. Sound travels much better through solids than it does air.
