Campaigners are calling for the zoo to be shut down.
Critics have been pressing for an overhaul of the practice, which has been branded "barbaric" by animal rights groups.
An Idaho middle-school science teacher is set to face trial next month over animal cruelty charges related to a March incident in which he allegedly fed a live, sick puppy to a snapping turtle during class.
She failed to report the incident to police at the time.
Rocky and Primo were two white and brown boxer dogs discovered at around 8 p.m. on March 19 shot and bludgeoned to death in a ditch on Valley Road in Middle Paxton Township. Bryan Gardner, 47, stands accused of killing them. He faces aggravated cruelty to animals and neglect charges.
A U.S. Marine has been arrested and accused of burglary and animal cruelty after allegedly breaking into a California animal shelter.
Controversy remains over its orca programme.
Officers released the puppy from the "obviously too small" kennel inside the trunk and provided the panting canine with water.
"This definitely was not another animal attacking these geese."
A video showed a raccoon in a wire trap being dunked into a large garbage bin being filled with water.
Around 3,200 of the two-legged marsupials will be put down in the next three months.
Police said Jill Blackstone acted as her sister's caregiver, a factor that may have been a potential motive.
"I've never seen anything like it," Perkins Township Assistant Chief Vince Donald said.
The chicken's headless body was found by a teacher in the school parking lot on Monday.
Despite improvements, experts say many states are still falling behind on legislation to help stop abuse.
Authorities found 10 venomous snakes and two dead cobras in the home of Brandon Joseph Boyles, a snake vlogger.