About FurStage

FurStage is a connected set of free pet tools: find a name, calculate your dog or cat’s age, and understand their life stage — all in one place.

How our data is sourced

Age calculations follow published science — the AVMA size-based tables and the 2020 UC San Diego epigenetic-clock formula — and life-stage guidance follows AVMA (dogs) and AAFP (cats) guidelines. Every number cites its source on-page.

Names are independently curated and human-reviewed, never copied from other lists.

FurStage provides general guidance only and is not a substitute for professional veterinary advice.