HOUSTON, Texas (KTRK) -- A Houston family claims their 5-year-old King Charles Spaniel died while in United Airlines' care.According to the family, their dog was in the cargo hold of an United airplane when it was delayed on the tarmac for two hours before taking off to San Francisco.The family said the dog died while in the cargo hold.In a statement, United said it is looking into the incident.Full statement released to ABC13: