Thomas Macdonald has been chief executive of Spring Sheep since last year. (Image: Supplied)A Chinese nutrition and wellness business will take a minority stake in Spring Sheep Milk as it prepares for its next stage of growth.ShareJoy Group will take a 6.6% stake in the Hamilton-headquartered business, more than a decade since it was founded by state-owned farmer Pāmu and SLC Group.The family-owned business based in Nanjing, near Shanghai, specialises in the senior nutrition and healthy ageing sector and employs more than 2000 staff.Thomas Macdonald has been chief executive of Spring Sheep since November, having worked within the...