Born on planet Krypton as was Superman and Supergirl. Krypto was originally the loyal best of Supergirl. He hid in the cargo hold of Supergirl's escape pod on the day Krypton exploded sending then to planet earth. It was there as we all know Superman and Supergirl later became known heros to the people of earth. Then on day as Supergirl and Krypto were helping Superman stop Lex Luthor, Krypto flew into a energy chamber that was set up as a trap to catch the Kryptonion K-9. Lex Luthor then turn on his machine twisting the DNA of Krypto with hi levels of A.G.R. Anthro Gama Radiation. Supergirl stoped Luthor's plan to enslave Krypto but not without consequence. The A.G.R. changed Krypto giving him human characteristics. He was like a man but furry. Also smarter, faster, stronger then he was. He later learned to speak human language and became just as maybe even more powerful then Superman himself. As a result Supergirl make Krypto a spacial suit that resembled the ones shevand superman wear but fit to s digs needs. And that is how the furry fandom defender came to be. Fightingbfir tooth, justice and the furry way.