I have a 5 y/o collie/fox terrier rescue. Been with us since she was 4 months old. Very bright, walked daily - I work from Home so rarely on her own, well trained, great recall and socialised young and fine with other dogs EXCEPT if the chase her.
She's very fixated on bAll chasing and loves it to the exclusion of any other kind of play. If another, strange dog starts to chase after her though, it really narks her. She tries to avoid but some dogs don't get the message (and nor do their owners) and she can round on them.
To deal with this, if I see her getting stressed, I call her to me and get her to sit calmly whilst explaining to the owner that she doesn't like being chased. This usually works except if other owners don't recall their dogs and continue to allow them to worry her which is obviously a pain in the arse.
I put a 'nervous' collar and lead on her to warn other owners. This is something that seems to have developed over the past year or two and I just wondered if anyone else has experience of this sort of behaviour and do you have any suggestions/recommendations/tips?