# Development of a Facial Expression Scale Using Farrowing as a Model of Pain in Sows

> Research article (Animals, 2020) · cited 40× · AI/ML

**Wikidata**: [openalex:W3099654303](https://www.wikidata.org/wiki/openalex:W3099654303)  
**Source**: https://4ort.xyz/entity/development-of-a-facial-expression-scale-using-farrowing-as-a-model-of-pain-in-sows