Could we breed bunnies the size of grizzly bears?

Michael Soso basically said it. Could you alter the genetic makeup of a tardigrade to get that large? Maybe. However, you'd almost certainly have to alter so much of the creature's genetic makeup to allow such a thing to happen. read more

Even if size was controlled by a single gene (it's not likely), there would be so many other genes that would have to change to permit such size and allow the creature to survive. Ultimately, you'd have to ask yourself, when does a tardigrade cease to be a tardigrade. read more

The grizzly bear can eat about 100 pounds of food a day. Grizzly bears do not hibernate - they are in a dormant state but their body temperature does not drop dramatically as in true hibernation. Grizzly bears and polar bears occasionally inter-breed in the wild. read more

Roaming over vast areas, grizzly bears are mainly vegetarian, but they will also hunt a variety of prey, particularly deer of various types. They are territorial, and most attacks on people can be explained by the bear’s poor eyesight, which suggests the person is a rival bear. read more