Choosing the right dog pack depends on your dog's unique characteristics and your planned activities. First, consider your dog's size and measure their girth to ensure a comfortable fit. Next, think about the adventures you'll share. Day packs are ideal for hikes, while multi-day adventures necessitate a larger pack. Trail runners will appreciate streamlined packs that prioritize speed and comfort. Finally, remember that a dog pack should never exceed 25% of your dog's body weight. Start light and gradually increase the weight as your dog adjusts to their new backpacker role.