Young calves should be housed for at least four weeks to ensure they stay warm and are using their energy for growth. Rearing facilities should be set up and maintained well to ensure calves stay healthy. The shelter should provide a minimum of 1.5m2 per calf and, where possible, minimise calf contact between pens. In hot conditions, restricted feeding systems, high meal/fibre intakes or scours, an additional 2-6l of water per calf per day is required. Post-Colostrum FeedFollowing the colostrum period, calves should be fed clean whole milk from the vat or a good quality calf milk replacer (CMR).