Police are hunting yobs who apparently ripped off a goose's beak in Wilton Park, Batley.
The animal has been left with just the top part of its beak and its tongue is hanging out.
The Canadian goose was found in the park by a dad who was told by witnesses a group of teenagers had attacked the bird – after previously killing one.
Police believe those responsible are killing animals as part of a sick game.
The dad who found the goose said: “These acts are cruel and we were really upset because this poor goose wasn’t able to feed due to only having part of its beak. We helped it by physically placing bread in its mouth but it couldn’t do it itself."
Carmen Hall, who lives in Florida but used to live in Batley, said online:
“This is absolutely horrific. How could anyone do this?
“I have spoken to the RSPCA myself but they said it was not classed as an emergency, but these cruel actions must be stopped.”
Leanne Plumtree, spokesperson for the RSPCA, said:
“We have been contacted about a Canada goose with a very serious injury in Wilton Park in Batley, and an animal collection officer went out to try to capture the bird twice on Monday and again on Tuesday but attempts have so far been unsuccessful."