Convenience alone could also account for all of the examples you mention. You can see the same trend in non-animal products as well - my wife just brought home

Convenience alone could also account for all of the examples you mention. You can see the same trend in non-animal products as well - my wife just brought home a pack of pudding twice as expensive because it's in an "easy to eat" pouch that doesn't require a spoon, unlike a normal pudding cup.