Krypto

Krypto was the family dog in Jor-El's household and was used for a test flight of the rocket that eventually carried baby Kal-El to Earth.

History
However, Krypto's rocket was blown off course and drifted in space for many years until the rocket picked up the signal from Kal-El's rocket that landed on Earth. Krypto arrived when Kal-El was a teenager, and the two got along famously.

Krypto adventured alongside young Kal-El, though he was not publicly known. Krypto had superhuman (or, super-canine) abilities, but with normal canine intellect. Superman has trained the dog, and Krypto has occasionally accompanied the Man of Steel on missions.

Powers

 * Kryptonian Canine Physiology
 * Solar Energy Absorption
 * Enhanced Hearing
 * Enhanced Vision
 * Enhanced Sense of Smell
 * Flight
 * Heat Vision
 * Super-Breath
 * Superhuman Durability
 * Superhuman Speed
 * Superhuman Stamina
 * Superhuman Strength

Weaknesses

 * Vulnerability to Kryptonite