Behavioural patterns and performance in heterozygous or halothane free suckling piglets and growing gilts Emma Fabrega, Josep Font, Domingo Carrion, Antonio Velarde, José Luis Ruiz-de-la-Torre, Alejandro Diestre and Xavier Manteca Anim. Res., 54 2 (2005) 95-103 DOI: 10.1051/animres:2005009