You are also correct about not comparing a dog (adomesticated animal that is now almost dependent on humans) with a tiger or any large cat. I love animals and spend holidays visiting Kenyan game reserves, and the strength of a lion is prodigious. They can take down wildebeest with one paw swipe. Even a leopard can drag more than its body weight straight up a tree holding it in its jaws. Comparing that with the family lab is a joke ...there are few dogs that I would have to worry about. A leopard, tiger or lion is like a small wilderness deity in terms of what it can bring to bear!
Reminds me of those people who keep Chimps as pets, not knowing that these highy intelligent animals get angry and jealous and murderous at times - and have 6 times (you read that right) the strength of a human male. Chimp attacks normally involve rippig of genitals, noses and ears, and even ripping of limbs out ( I did not say biting out ...literally gripping an arm and ripping it out with sheer strength alone). Some animals are too strong or intelligent for captivity.