Here is a video of a dog barking and snapping at two lions (one male, one female). The limping dog backs them both up.
Is there a reason that a dog would attack lions (besides just being really stupid)? There does not appear to be anything nearby that he is protecting.
Is there a reason why the lions seem so non-confrontational? At 42 seconds in, it looks like the dog got really close to biting the male lion’s mouth. The lion just keeps backing up like he is scared.