Objective.

To determine whether short term supplemantation at two levels (1 or 2 g/kg) of clinoptilolite (CLNP) in the colostrum of dairy calves had any effect on total weight gain (TWG) and mean daily gain of weight (mdwg).

Materials and methods.

A total of 24 clinically healthy calves without diarrhea were assigned in a subset of three major groups of calves were studied: group I (n=8) received colostrum with clnp at the rate of 1/kg started immediately following calving at 12 and 24 hours, for a total of 2 doses. Group II consisted of calves (n=8) receiving colostrum with clnp at the rate of 2/kg within the same interval as the first experimental group. The last group III, which served as control, received solely colostrum.

Results.

Group had significant effect on weight (kg) of Holstein calves [twg (mean±SE)- control: 12.66±0.349, group I: 14.73±0.414, group II: 14.19±0.468, p<0.01; mdwg (mean±SE)-control: 0.338±0.0155, group I: 0.396±0.0189, group II: 0.397±0.0196, p<0.05]. There was a significant difference observed for twg (p<0.01) and mdwg (p<0.05) among control group and both clnp treatment groups.

Conclusions.

The results showed that the addition of both levels of clinoptilolite administration via colostrum appeared to enhance twg and mdwg in newborn calves without having any observable adverse effect.

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