A Houston-area family claims to have found a dead rat in of a bottle of Dr. Pepper ? one they say their toddler had been sipping from.

John Graves of Katy, Texas, shared a photo of the rodent on his Facebook page Monday. Graves wrote that the family only discovered the animal after his 3-year-old grandson, Kayden, had gotten about halfway through the 20-ounce soft drink, which Graves says they bought Sunday at a Valero gas station in nearby Galveston.

“Nothing like your grandson drinking half a Dr. Pepper only to find a dead rat floating [in] the bottle,” he wrote on Facebook.

Speaking to KPRC, Graves expressed his disgust and concern for his grandson’s safety.

“You think of rabies,” he told the news station. “You think of dirty, filthy rodents. You know, what did he ingest?”

Graves said the family contacted the boy’s physician, who took blood and urine samples from him. They also “contacted the state of Texas, and contacted the CDC,” he told KPRC.

In an email to The Huffington Post Tuesday, Graves said they are awaiting test results for leptospirosis, a bacterial disease that can be fatal, according to the Centers for Disease Control and Prevention.