As any mother would, Ruby went with her baby back to New Bolton Center Hospital, where doctors tried to determine what was wrong with the calf.
Meanwhile, in response to a plea from staff at Poplar Spring, donations for Lucas's hospital bills poured in from animal lovers.
"A HUGE thanks to everyone who contributed to help Lucas the calf with his vet bills," Poplar Spring wrote on Facebook. Thanks to people rooting for Lucas, the sanctuary reached its fundraising goal in less than 24 hours. "We are truly grateful for the outpouring of support for this amazing little calf who has struggled so hard, since the day he was born."