Socks was euthanized after months of treatment for cancer . Cat was a cat before being adopted by Clintons . Veterinarians say he was probably either 19 or 20 years old . Living with President Clinton 's former wife after Clinton left office .
Socks was euthanized after months of treatment for cancer . Cat was a cat before being adopted by Clintons . Living with President Clinton 's former wife after Clinton left office .