The DoberDawn site has 2 links on the left side of the page that are very useful: How to Dremel dog nails, and How to bike with your dog. Remember that she is biking Dobermans - for Shelties, I would start with 1/4 to 1/2 kilometre, working up to between 1.5 to 2 kms over a period of time. It all depends on your dog's physical condition, age, size, etc. - use common sense.
Please note, recent research I have read indicates that ALL harness/seat belt types of restraints have failed in crash tests. I am a firm believer in using crates in vehicles to safeguard your dogs. JMHO.
Please contact me if you find any broken links on the website.
Devon, Alberta, Canada (ship Edmonton International Airport)