I doubt they'll find out who's done it but I bet if they do, the offenders will just get a slap on the wrist, and a suspended sentence. It's disgraceful.
Some tramp from birkenhead recently got jail for throwing his young puppy at the wall.
a quick search for "birkenhead tramp jailed throwing puppy wall" brings this up at the top.... Tramp here
Tramp looks as if he has gone to court in clothes he stole from prison.