Rocco Real Hearts Multibuy 24 x 400g

I've been buying Rocco products for a long time. I've noticed that for some time now, there have been strange-looking dark to black bits in the food. I always pick them out. Who knows what they are, after all. But I won't be buying Rocco anymore. By the way, the amount of whole poultry hearts also varies a lot. Sometimes there aren't any at all.