[header] How to fit a dog backpack [title] Consult your veterinarian. [step] While most dogs can use a backpack with no problems, some dogs with pre-existing health issues or skeletal problems should avoid using one. Talk with your veterinarian to see whether your dog is a candidate for wearing a backpack. 
[substeps] Dogs that are not yet fully grown should not wear backpacks, because they can develop stressed joints or arthritis. [title] Measure your dog's girth.