Estimation question

How much does the US spend in dog food each year?

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What this question tests

Estimation skill using pet ownership statistics and typical spending patterns.

How to approach it

  1. Pick a method: estimate the number of dogs in the US, then multiply by average annual food spend per dog.
  2. Assume roughly 90 million dogs are owned across US households, a commonly cited order of magnitude.
  3. Assume an average annual food spend per dog, roughly 250 to 400 dollars, accounting for a mix of budget and premium food buyers.
  4. Multiply dog count by average spend to reach a total annual figure.
  5. Sanity check against known pet industry total spend figures, which are in the tens of billions annually.
  6. State the final estimate as an order of magnitude, likely in the 20 to 30 billion dollar range.

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