Písomná otázka E-3036/07 Bart Staes (Verts/ALE), Kathalijne Maria Buitenweg (Verts/ALE), David Hammerstein (Verts/ALE), Paulo Casaca (PSE), Karin Scheele (PSE), John Bowis (PPE-DE) a Neil Parish (PPE-DE) Komisii. Kastrácia prasiatok