Stanley, the 18-year-old cat who received a $19,000 kidney transplant last November, died last week.

The cat’s owner Betsy Boyd, who directs the master’s degree program in creative writing and publishing at the University of Baltimore, said she made the decision to put the feline to sleep after he was suffering from some internal complications.

“It was such a hard decision,” she said, the biggest challenge being “how do you give a pet the longest, most comfortable life?”

Boyd said Stanley became ill a few weeks ago, and Boyd took him to various veterinarians, where he received fluids and stimulants, but nothing was working.

Last week, Dan Petrus, an internist at Atlantic Veterinary Internal Medicine and Oncology, discovered that Stanley had developed peritonitis, a severe inflammation of the abdomen.

“At that point, he’d been through a lot and he would not have been a good candidate for surgery” due to his age and his kidney transplant, which required him to take drugs that suppressed immune response so that his transplant would not be rejected, Petrus said.

— Brittany Britto