Today my partner and I took Jazz to our local park, when we take her there because its a small but open field, we take her ball catcher so she gets plenty of exercise chasing her ball - which she loves. Anyway, when we arrive there were a pair of adorable dogs (bearded collies I think.) neither showed any aggression and wanted to play with Jazz. She however was far more interested in her ball....... One of the dogs kept persisting and Jazz growled a bit..... The dog kept persisting and Jazz started to snarl and snap... And the dog still didn't get the message... So jazz basically attacked it!! I have never seen this kind of behaviour from her and we were both horrified!!! Suffice to say she was placed straight back on lead.

i am certain there is nothing "wrong" with jazz, either physically or mentally but I am concerned that this is a training issue and we need to nip it in the bud...my first guess is possession over the ball, my second is that maybe we have mollycoddled her too much and she's getting "small dog syndrome". She's well socialised and goes to day care at least once a week so she's never had an issue with other dogs.....

i'd love some advice please!! She's @ 16 months.