when preparing the food the is  medication as well as probiotics that can be added to food like Ivomac-de wormer its used for de-worming with the animals, we use bio-rem (pro-biotic) only used for herbivores,protexin (pro-biotec)which is used for carnivores and herbivores. i have learned about the process of  following the good procedures with old food, it must go into separate waste bin, some fruits we throw them at the platform if its still in a good conditions for the animal like nyala and impalas and if not it have to be decomposed   or goes to the dumping site with other waste and for meat we take it to the vulter resturant if it doesnt have medication into their body and if it does we burn the meat, what we call combutioin