Time and daily routine
Dogs generally need more scheduled outdoor elimination, exercise, training, and social interaction. Cats are often more flexible about short periods alone, but they still need daily play, enrichment, litter-box care, and social attention.
Housing and activity
A yard is not a substitute for exercise, and an apartment does not automatically rule out a dog. Energy level, barking, size, mobility, litter-box placement, climbing space, and access to safe exercise matter more than simple labels.
Cost and healthcare
Food, preventive care, emergency visits, dental care, grooming, training, boarding, medications, and chronic disease can all create significant lifetime costs. Larger dogs often cost more to feed and medicate; cats may live well into their teens and beyond.
Think about the individual
Age, temperament, prior socialization, medical history, and behavior are more predictive than stereotypes about breed or species. Meeting an animal more than once and discussing the match with a responsible shelter, rescue, breeder, and veterinarian can reduce mismatches.