The animal was found suspended by its back legs after becoming trapped.
Politico, which first reported the news, said he posted a launch video on his account on Saturday night. The video showed Trump greeting fans at an Ultimate Fighting Championship fight in Newark, New Jersey. The account, President Donald J. Trump with the address @realdonaldtrump, had more than 450,000 followers by 0800 GMT.
Essex Police says the assault may be linked to another incident at a nearby pub