- www.perfectpaws.com/bark.html
- Excessive barking | So how do I make Blackie stop barking up a stormwww.canismajor.com/dog/barking.html
- www.dogpatch.org/sheltie/barking.html
- www.cuhumane.org/topics/bark.html
- www.usask.ca/wcvm/herdmed/applied-ethology/behaviourproblems/barking.html