It's not a difficult sport. You'll need the right skijoring equipment including a belt and dog harness. You'll also need patience and training for you AND your dogs.
Equipment You'll Need
FOR THE DOG:
A good quality dog harness. It is important that it fits well to avoid injuring the dog.
Dog booties. Dog's paws can be sensitive and if you're planning to skijor long distances or over rough or icy trails, the booties will stop your dog's paws from becoming cracked and bloody.
A dog jacket. If your dog has short hair, or you'll be skijoring in extremely cold or windy conditions, a dog jacket or blanket can provide extra warmth and comfort.
A skijoring line. It's essentially a synthetic line with a bungee cord that runs between the dog's harness and your skijoring belt.
Skis, boots and poles. Make sure the equipment is in good shape. Metal skis are not recommended for skijoring.
Clothes appropriate for the weather conditions. It's a good idea to dress in layers. You'll be working hard, so it's easy to become overheated.
Small backpack. You'll need somewhere to carry water, dog treats, cell phone and addition clothing. It's important your dog has a source of water. Even in cold temperatures he can easily become dehydrated.
Skijoring belt. Choose one with a wide strap on the back. There are also belts available that you step into, which help distribute the pull more evenly, reducing the pressure on your back.
Overall, take your time and research the best information on skijoring.
Get your dog used to wearing the harness for an hour at a time. Reinforce with praise and treats. It's important that he associates the harness with a positive experience.
You probably already know if your dog has a natural tendency to pull. In fact, it is a characteristic that you may have spent some time trying to break him of.
Start by attaching a log or other relatively lightweight object to the skijoring line. Run in front of the dog, encouraging him to follow you. Training with a partner and his or her dog is also a good idea. Dogs like to chase other dogs.
You can also command the dog to stay while you move up the trail, and then call him to come to you, dragging the line and log behind him. Of course, that warrants praise and a treat.
You may need some training too. You may be able to borrow a trained skijoring dog to get used to feeling the pull on your skijoring belt and feel comfortable being pulled on your skis,
Keep your training sessions short to begin with and reward the dog with a treat after each session. Skijoring is hard work, so keep your dog's physical fitness level in mind. If he hasn't had much exercise or is overweight build the sessions up very gradually.
If possible, when you do your first skijor, choose a trail your dog is familiar with. It may be an area you have run or walked together in the summer.
Choose a trail that is relatively flat and straight to begin with, particularly if your dog still isn't fully trained to respond to all the commands.
Ask for help from experienced skijorers. There are also some great books and videos on skijoring.
Be patient and have fun. Before you know it, you'll be competing in skijoring races.
The commands for skijoring are the same as dog mushing. "Mush" is only used in the movies.
GEE means turn right
HAW means turn left
HIKE means let's go
WHOA means stop
STRAIGHT AHEAD means keep going straight. It's used if your dog encounters another dog or anything else that distracts him on the trail.
There are many more commands you and your dog can learn, but it's a good idea to become proficient with the basics first.
It may take many sessions of practice and reward before your dog responds efficiently to the commands.