HOUSTON (AP/CBSDFW.COM) — A dog returning to the United States with a soldier’s family was euthanized after suffering heat stroke in Houston while in the care of United Airlines.

Rachel Estes tells the Houston Chronicle that she and her 5-year-old daughter were returning to North Carolina from South Korea, where her husband was completing a tour of duty. She says the family’s two cats arrived in Charlotte, N.C., a day after the family’s arrival, but their 14-pound terrier had to be euthanized at a veterinary clinic near Bush Intercontinental Airport.

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The dog’s medical chart at Animal Emergency clinic Northeast in Humble showed the dog arrived collapsed in its carrier, had been “tangled up in harness,” and suffered heat stroke.

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United Airlines said in a statement that it wasn’t responsible for the death.

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