Sick, braindead chav scum strike again. As others have said, little shocks us any more but this actually upset me to read it.
No way would a puppy do anything that could be construed by anyone owning a functioning brain cell as aggressive, and even if it did, what the hell did they think a little Jack Russell puppy was going to do to them? The fact is that such stupid people as the morons the puppy approached know only one way to react to anything they're unsure of, violent aggression. It's something we see fairly regularly if we're honest, a brush past an acne victim in any town centre can often be met with threats of violence and a tirade of abuse.
What's worst of all though is that this idiot minority give all young people a bad name, the majority of whom are decent, law-abiding citizens. I feel for this poor girl, especially given the reasons behind her having the puppy in the first place. Let's just hope this experience doesn't damage her too much, and that one day the wastes of ovary space who killed her dog are met by something or somebody far better equipped to defend themselves.