Do Young Calves Drink Water?
That is the question for research done in Germany.
The results are at this link
The video is less than 2 minutes - calves with ad lib access to milk were still drinking 0.8 litres of water daily at 2 weeks. Calves with limited access to milk were drinking almost twice as much.
Lesson? Provide ad lib access to water for calves from day 2! Period.