As long as it is eating your alright. Not sure of the benefits of pork heart. Seems like all over the world people feed different types of heart. Beef heart started it. It’s not a natural food it was done because people couldn’t afford fish living inland. Your fdbw is a much better choice. Also if you can get the black worm flakes and some pellet food. My discus eat everything dropped in. Mince the pork heart and feed it once or twice a week right before your water changes. This way you remove all the left over food.