What the HELL is wrong with some people!?!
Hitting someone's dog...... holy cow..... I don't know what I would do if someone ever hit my dogs.
Nala... I'm so sorry your birthday trip to the park was so bad! It's to bad that you had to run into someone like THAT on such a special day!
Kayann, I feel for you as well!! I'm so sorry you had a run in with a #1 JERK!!!!!!!!! (I really have a few other words that could fit him... but I'm trying to be nice here....)

Nala.... no matter what happened... I'm sure you had a wonderful Birthday anyway!!!