Melbourne-based dog gear brand  PK9 Gear  has released a new online guide designed to help dog owners choose better, safer and more durable collars in a market crowded with cheap, mass-produced options. Titled   Best Dog Collars in Australia: A Trainer’s Guide to Quality & Durability , the guide was written by PK9 Gear founder Chris Loverseed, who is also the owner of Positive K9 Training and holds a Certificate III in Dog Training and Behaviour. Rather than focusing on trend