Tilly (above) and Sadie take turns rotating into the calf hutch area
where Zoo visitors can see them.
Posted July 2021
The Zoo is pleased to announce the birth of two new calves in the Northwestern Mutual Family Farm! Sadie, a female black and white Holstein calf, was born June 14 to mom, Betsy. Sadie, who was born a twin, weighed 65 pounds at birth, which is considered small for a newborn calf. (Unfortunately, the twin calf was humanely euthanized due to significant heart issues.)
Tilly, a female red and white Holstein calf, was born June 17 to mom, Jovie. She weighed 85 pounds at birth, which is in the typical weight range for a newborn calf.
Zookeeper Bridget feeds Sadie.
Both calves’ diets consist of bottle-fed cow’s milk, which they get three times each day. They also receive hay and grain that they may eat if they choose, although at this age, they don’t yet eat much of it. At about 8 weeks old, their zookeepers will begin to wean them off milk.
Both calves live in an off-exhibit area in the Heifer Barn. They are taking turns rotating into the calf hutch area outside the barn where Zoo visitors can see them. Weather permitting, either Sadie or Tilly can be viewed in the calf hutch every day. Once they grow more and are weaned, both Sadie and Tilly will have access to the Heifer outdoor area together.
Zookeepers report that both calves have very sweet personalities. Tilly can be shy at times, but she is getting more comfortable and braver as she gets older. Stop by the Northwestern Mutual Family Farm to say hello to the newest additions!