The group's principal activities are to develop, manufacture and distribute products and provide services for veterinary, food and environmental markets. the group operates under two divisions: companion animal group and food and environmental division. the group's products and services include biology-based detection systems, chemistry-based detection systems, laboratory testing, specialized consulting services, veterinary practice information management software systems and related services. companion animal group accounted for 80% of 2001 revenues and food and environment division, 20%.