The important thing is consistency.
* Choose a side and stick with it. This will help your dog understand the pattern and avoid confusion.
* It doesn't matter which side you choose. Left or right, it's up to you!
* Some people prefer to start on the side the dog's handler is on. This can make it easier to guide the dog through the poles.
Ultimately, the best side to start on is the one that works best for you and your dog!