I had similar experience when birding at Mai Po some years ago. Along the restricted road of Mai Po, not too far away from the entrance drop bar with red 'stop' sign and the white restricted road sign 'Except with Permit', there were two village houses that keep dogs. On many cases, when I walked or cycled past these houses, the dogs came out from the unlocked gate and barked and chased me. Eventually I purchased an ultrasonic dog repellent, which proved effective. The dogs stopped barking and turned away when I pressed the button of the repellent.
There are two watch-its: (1) There are many so called 'ultrasonic dog repellent' which are not effective - better bring a dog to test before purchase (2) Check battery before birding trip - the worst time to find out that the repellent has dead battery is when you press the button and the barking dogs continue to close in.
Quote:
Original posted by parrotkeen at 7/06/2022 12:56 
So I got attacked by dogs twice when going to the fishponds. One in Tai Sang Wai and one in Mai Po.
Once when we were going to Tai Sang Wai, I suddenly saw a pack of dogs stalking me. However, a car ...
