They do report the possibility of salmonella.
Vitamins A, B, C, and E
Calcium, Iron, Magnesium, Niacin, Phosphorus, Potassium, Zinc
Chlorophyll, Amino Acids
From what I'm seeing they do seem to be fairly high in calcium, so not good in large quantities for pigs, I'd think.
Maize is corn. Two sources of corn, not particularly nutritious. Keep in mind the items are listed (supposedly) from highest percentage to lowest percentage.
It sounds like they are throwing "good sounding" items at the wall and trying to get people to feed it to their pet.