Eating dogs in China...

[Anomalocaris]

From a biological perspective, the meat of a carnivore is more toxic than the meat of a grazer. You don't see much of carnivores eating carnivores except in the sea. Lions and hyenas are great enemies in the wild and male lions will often kill a hyena on sight - but I've never heard of them eating one.

Packs of wild dogs is known to have taken down isolated lion and tigers and eaten them. There is one documented case where a pack of 20+ wild dogs stalked and hunted a long Siberian tiger. The tiger killed 14 of the dogs, but the remaining dogs killed and ate the tiger.