I'd expect a dog who has been negatively reinforced by barking and chasing away strangers to continue doing that. But you can over time teach your dog that a particular stimulus (ie, the biker) is a cue for something else... Like stay and watch calmly, or bark and be still. But it would probably take a large amount of effort and impeccable timing on your part.
I don't see anything wrong with dogs barking in THEIR fenced yard though. It would probably be a liability if your property was unfenced and they left the property to chase, or if your property boundaries were unclear and some tourist stepped onto your rural-setting field for a photo then was attacked by your dog.
I don't see anything wrong with dogs barking in THEIR fenced yard though. It would probably be a liability if your property was unfenced and they left the property to chase, or if your property boundaries were unclear and some tourist stepped onto your rural-setting field for a photo then was attacked by your dog.