She's a very friendly gentle 10 month old working cocker and generally pretty happy and pleased to see people and other dogs.
But a few times in the last couple of weeks we've been passed by a particular man on the street and she's immediately started straining on lead, her body language has become aggressive and she's growling and baring her teeth. As soon as he's gone she reverts to normal. I obviously hold her back and try to calm her but he must think I've got a seriously aggressive dog.
I've never seen him before but now we keep passing him. He seems pretty normal as far as I can tell. Any idea why she would have taken against one random individual like this? She is clearly really upset by him. I've never seen her react like this to anyone else