Hey, at least the hooves aren't in the FOOD! I can't imagine they are of any nutritional value at all.
I would merely think that organ meat is not that great. Some organs of the body are used to filter out toxins and harmful agents in the bloodstream, and these things collect in the organs for removal. If there is a high concentration of toxins in the organ, and they use the organ in the pup's food, I cannot see how that can ever be good...Anyhow, I would simply do my best to avoid them.