MENDON, Mass. — The transformer fire that knocked out power to thousands of homes and businesses in Boston turned out to be a stroke of delicious luck for the big cats at a Massachusetts zoo.

The Capital Grille donated 2,500 pounds of steak worth $20,000 to the Southwick’s Zoo in Mendon after the restaurant lost power on Tuesday.

The prime cuts of meat were no longer fit for human consumption even though they were ushed to a refrigerated truck, according to Hunter Robinson, spokesman for the Capital Grille at the Hynes Convention Center

The zoo’s two Bengal tigers, an African lion and a leopard dined like kings on Thursday. Each ate 15-20 pounds of meat. And there are enough leftovers to feed the cats for weeks to come.

Zoo owner Betsey Brewer tells The Telegram & Gazette she was surprised and delighted by the out-of-the-blue offer from Robinson.

“He said, ‘We lost all our meat,'” Brewer recalled. “They just called here and said, ‘Are you interested?’ and I said, ‘Sure!’ ”

About 21,000 customers lost power after the fire. Almost all customers were back online by Friday.

Southwick’s Zoo opens for the season on April 14.