Which description best defines net welfare?

• A. Annual welfare score
• B. Welfare potential minus stress
• C. Welfare quality index
• D. Sum of an animal's welfare experiences over its lifetime

Answer: (D)

Net welfare is about the cumulative impact of all experiences an animal has across its life. It combines both positive experiences that improve well-being and negative ones that detract from it, taking into account how often they occur and how severe they are, to produce a single long‑term assessment. This lifetime perspective distinguishes it from a one-year snapshot or from ideas like welfare potential minus stress or a welfare quality index, which describe different aspects or constructs of welfare rather than the overall lifetime total. So, the description that the net welfare is the sum of an animal’s welfare experiences over its lifetime best captures what this concept means.