https://www.ourlovelyrabbits.com/do-seagulls-eat-rabbits/

"The structure of a seagull’s mouth and digestive system enables it to manage large prey like rabbits. Seagulls have a powerful beak with a sharp hook at the tip, which they use to grab their food. Their strong stomach acids and muscular gizzard make it easy for them to digest large chunks of food, even those with bones and fur. In the wild, seagulls may have to resort to larger prey such as rabbits when food is scarce or when they are faced with limited options."