24 May 1996

Aggression rise

HOUSING in intermediate groups of 10-40 sows increases aggression, claims Cambac JMA research.

"The intermediate size may well suit producers with a large herd weaning groups of over 10 sows," said researcher Phil Baynes. But he has found that groups of under 10 sows or over 60 were best at limiting aggression whatever the feeding system. &#42