Animals in the class Amphibia spend part of their lives under water and part on land. Frogs, toads, and salamanders are amphibians. Many of these species must keep their skin moist by periodically returning to wet areas. All of them must return to water in order to reproduce because their eggs would dry out otherwise.
He then meets Mittens (Susie Essman), a female alley cat who bullies pigeons out of their food. Bolt (believing she's one of Calico's minions) forces Mittens to help him get back to Penny, and after Bolt ends up knocking Mittens unconscious into a letter box, the two start their epic journey westward on a truck.
For the French version, Bolt is voiced by actor Richard Anconina and the two cats and the various pigeons are voiced by Omar Sy and Fred Testot. John Travolta. John Travolta, the highly-regarded, award-winning actor, plays the canine TV star Bolt. His voice gives a personality to Bolt that couldn't have been found elsewhere.