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Use of the artificial teat without lifting assistance in relation to age

The majority of the calves in the study were able to stand up and suckle the artificial teat for the first time without lifting assistance on the second or the third day of age.

Age at which calves (n = 78) were able to stand up and suckle the artificial teat without lifting assistance for the first time.
Age at which calves (n = 78) were able to stand up and suckle the artificial teat without lifting assistance for the first time.

Odor test

In the odor test, the calves as a group did not show a significant preference for a teat neither for the order of teat investigation (Binomial: n = 45, 23:22, p = 1) nor when assessing suckling times for the control teat versus the odor teat (Wilcoxon: n = 51, Z = -0.272, p = 0.786).

 

 

A. Number of calves (n = 51) that investigated a particular type of teat as the first one in the majority of their testing sessions, in the odor test. B. Average suckling time for the control teat (n = 51, mean = 25.99, S.D. = 10.16) and the odor teat (n = 51, mean = 26.30, S.D. = 10.37) in the odor test.
A. Number of calves (n = 51) that investigated a particular type of teat as the first one in the majority of their testing sessions, in the odor test. B. Average suckling time for the control teat (n = 51, mean = 25.99, S.D. = 10.16) and the odor teat (n = 51, mean = 26.30, S.D. = 10.37) in the odor test.

Taste test

In the taste test, the calves as a group showed a significant preference for the control teat regarding the order of teat investigation (Binomial: n = 51, 33:14, p = 0.008) and a significant preference for the taste teat when assessing suckling times for the control teat versus the taste teat (Wilcoxon: n = 51, Z = -6.177, p < 0.001).

 

 

A. Number of calves (n = 51) that investigated a particular type of teat as the first one in the majority of their testing sessions, in the taste test. B. Average suckling time for the control teat (n = 51, mean = 30.22, S.D. = 8.84) and the taste teat (n = 51, mean = 50.68, S.D. = 7.33) in the taste test.

Assessment of total suckling times (control plus modified teat)

The calves showed a significantly longer total suckling time during the taste test in comparison to the odor test (Wilcoxon: n = 51, Z = -6.215, p < 0.001). Furthermore, a significant positive correlation was found between the average total suckling time per calf and the consecutive testing sessions in the taste test (Spearman: n = 10, rs = 0.685, p = 0.035). In contrast, the average total suckling time per calf during the odor test did not systematically vary across the ten consecutive testing sessions (Spearman: n = 10, rs = -0.237, p = 0.510).

 

 

A. Average total suckling time for the odor test (n = 51, mean = 47.13, S.D. = 17.35) versus the taste test (n = 51, mean = 74.61, S.D. = 15.26).  B. Variation in the average total suckling time per calf across the ten consecutive testing sessions (odor test: circular marks, taste test: square marks).
A. Average total suckling time for the odor test (n = 51, mean = 47.13, S.D. = 17.35) versus the taste test (n = 51, mean = 74.61, S.D. = 15.26). B. Variation in the average total suckling time per calf across the ten consecutive testing sessions (odor test: circular marks, taste test: square marks).


Responsible for this page: Agneta Johansson
Last updated: 05/30/17