We have had our place in Calis for 10 years now and I can honestly say we have NEVER seen a nasty street dog. Yes they do walk around together, yes they also go for other dogs that come onto their territory, the reason they bark at/attack bikes is because somewhere down the line a scumbag has probably kicked hell out of them. My 8 year old daughter has grown up with these dogs and loves them, we always carry treats for them everywhere we go. Let's not forget these dogs didn't ask to be dumped on the streets or be mistreated, all they want is food, love and affection. If you don't like dogs then ignore them and they will leave you alone.
For the lady asking about Quick (the Lion dog), he has been taken by some English bloke but he's escaped a few times and come back to the Nil Bar