Sphynx Info
About Sphynx
What this tool does
Pet care tools convert dog and cat ages to human-equivalent years, calculate daily calorie needs, track weight over time, schedule vaccinations, and estimate medication dosages by body weight.
Why use this tool
Pet owners want to make informed health decisions. Knowing whether a pet is overweight for its breed, when the next vaccination is due, or how to adjust feeding portions after a vet visit is easier with purpose-built calculators.
How it works
Age conversion uses breed-specific aging curves (large dogs age faster than small dogs). Calorie calculators apply resting energy requirement (RER) formulas with activity multipliers. Weight trackers plot data against breed-standard ranges.
Pro tip
For dogs, the old "7 human years per dog year" rule is misleading. A more accurate formula is 16 ln(dog age) + 31, which accounts for the rapid aging in the first two years.
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