Small Dog vs Large Dog: Which Costs More Lifetime?

The main annual cost differences between small and large breeds:

Food: A Great Dane (70kg) consumes 8–10 cups of food per day; a Chihuahua (3kg) consumes 1/4–1/2 cup. Annual food cost: $800–$1,500 for a large breed vs $200–$400 for a small breed.

Medication: Flea/tick prevention, heartworm medication, and prescription drugs are dosed by weight. A Great Dane's monthly flea treatment costs $20–$40; a Chihuahua's costs $5–$10. This differential applies to every weight-based medication.

Surgery costs: Surgical costs scale (imperfectly) with body weight due to anaesthetic doses and procedure complexity. Neutering a Great Dane costs $400–$700; neutering a Chihuahua costs $150–$300.

Small dogs live significantly longer than large breeds. A Chihuahua may live 14–16 years; a Great Dane has an average lifespan of 7–9 years. This means:

• →A Chihuahua at $1,800/year for 15 years = $27,000 lifetime
• →A Great Dane at $3,200/year for 8 years = $25,600 lifetime

The difference is smaller than most people expect. The Great Dane costs more per year but for fewer years; the Chihuahua costs less per year but for more years.

This calculation changes significantly if you factor in end-of-life care, which tends to be more expensive for large breeds due to higher medication and surgery costs.