Start with the use case
A leash for city walks, a carrier for veterinary visits and a bed for a tiled basement solve different problems.
Fit comes before features
Sizing charts are brand-specific; measure the pet and compare those measurements with the manufacturer's instructions.
Think about Canadian conditions
Snow, slush, road salt, rain, summer heat and long-distance travel can change which materials and features are useful.
Compare ownership cost
Replacement parts, filters, liners, litter accessories or batteries can matter more over time than the initial price.
General product-selection information only. A pet's health, anatomy, mobility, breathing and behaviour can change what equipment is appropriate. Follow product directions and ask a veterinarian or qualified animal-care professional when those issues matter.