USB cables are 4 wires... you might want to try fixing it yourself... you can buy another USB cable at your local computer store or radio shack... you might even be able to cut out the bad spot... if fido did not chew the whole cord.
4 soldier connection to make. Not a big deal for me, but your situation is different. It is also possible that something internal is messed up as a result. Either way, you can send it in and have it replaced... contact support for more info.