(19)

(11)

EP 0 497 760 A1

(12)

(43) Date of publication: 12.08.1992 Bulletin 1992/33 (21) Application number: 90902359.0 (22) Date of filing: 29.01.1990

(51) International Patent Classification (IPC):  A01K 1/ 02( . ) A01K 11/ 00( . ) (86) International application number: PCT/GB1990/000126 (87) International publication number: WO 1991/003930 (04.04.1991 Gazette 1991/08)

(84) Designated Contracting States: FR GB NL (30) Priority: 21.09.1989 GB 19890021397 14.10.1989 GB 19890023196 (71) Applicant: NEWSHAM HYBRID PIGS LIMITED Malton, North Yorkshire YO17 0TD (GB)	(72) Inventor: BRISBY, Ian, Robert North Yorkshire YO17 0TD (GB) (74) Representative: Denmark, James  Bailey, Walsh & Co. 5 York Place Leeds LS1 2SD Yorkshire Leeds LS1 2SD Yorkshire (GB)