Feeding mastitis milk to organic dairy calves: effect on health and performance during suckling and on udder health at first calving

Table 2 Results of the linear model performed for the rearing and breeding period

Variable	Level	Coefficient	Std. Error	T value	p
Intercept		711.3	36.6	19.4	<0.001
Treatment	HMG	Reference
	UMG	-6.5	41.2	-0.2	0.87
Calf origin	Farm 1	Reference
	Farm 2	-238.7	55.6	-4.3	<0.001
	Farm 3	33.1	48.4	0.7	0.50
	Farm 4	256.0	85.6	3.0	0.006

Final linear model after removing not significant variables by stepwise backward method (breed, birth season, and disease days during suckling time) for the significant influence factor “farm of origin” on weight gain during the rearing and breeding period; UMG was treated as fixed model factor of investigation.

ISSN: 1746-6148