Similar process to how I raise quail for raptors. Feed high quality foods and I even cover that seed in Raptor Boost as well as add vitamins to their water... I always thought " Gut Loading" was referring to native flora in the , crop, stomach & intestine. The beneficial bacteria in our systems ( probiotics - eosinophils ). A practice called by the same name is usually done after a treatment of antibiotics (which strip the system of native flora ) by feeding Raptors the gut of the prey animal as opposed to removing it before feeding. Most hawks instinctively know when they need it. I've witnessed my hawks all selectively remove or consume the gut/ Rumen of large mice, squirrel, quail, etc. Raptor Boost is full of probiotics and performance based supplements and is a good choice for those not feeding a fully varied Whole Food diet to their hawks. My preferred supplement over vita hawk because of its lack of ethoxiquin, which vita hawk uses as it's main preservative .
Please carry on, this is an interesting discussion for the molt ...
It is good to have an end to Journey towards, but it is the journey that matters in the End. - Ernest Hemingway