3. Results
All calves drank volumes far exceeding their normal meal size. Milk in the rumen was not detected, regardless of intake. Four of the six calves drank more than 5 l in one meal, while two of them drank more than 6 l when the highest amounts were offered (Table 3). Mean intake from the teat bottle in one meal was 3.8 (8.1% of BW), 4.9 (10.2% of BW) and 5.4 (10.8% of BW) litres of milk on Level 1, 2 and 3, respectively. The highest voluntary intake recorded in the study was 6.8 l (13.2% of BW).