OXFORD, Iowa — The water buffalo who escaped from a Pleasant Hill farm and was shot by police back in August is now fighting for his life.

Phill’s escape captivated the nation and his recovery has not been easy. After he was recaptured, Phill was surrendered by his owner to the Iowa Farm Sanctuary. He was joined there by two other water buffalos, Sal and Jane, who the same owner also surrendered.

The sanctuary posted Thursday about a quick decline in Phill’s condition, saying he “was found lethargic, unsteady on his feet, and had stopped eating.” Phill was rushed to the Iowa State University Large Animal Hospital in Ames where he was determined to be in critical condition.

The ISU veterinary team is working to determine what caused Phill’s sickness. The post said they’re examining whether the lead bullet that remained in Phill after being shot by police is causing lead toxicity. He’s also showing signs of a severe infection that could cause rapid deterioration in his condition. Ultrasounds suggest there could be a gastrointestinal blockage and his rumen isn’t functioning normally.

According to the Iowa Farm Sanctuary, he is receiving care around the clock and may require surgery on Friday. They plan to post updates on the sanctuary’s Facebook page.