The June, 2014 Airline Pet Travel Report contains pet incidents for the month of April, 2014.
On United Airlines flight 0101 from Manchester, England to Washington, DC, an 8 year old, male dog, named Alfie was discovered to be injured. United Airlines reports that the dog chewed on the side of the kennel, and the water disperser. The dog was taken to the vet where it was examined and treated. The owner told United Airlines that the dog was not used to being in a kennel. United Airlines did not elaborate any further on the injuries.
Source: June 2014 Air Travel Consumer Report.