Table 1.

Information on experimental and control calves and the batches of colostrum fed

Calf (no.)	Breed	Calf from farm	Colostrum from cow	Colostrum from farm	Litres of colostrum ingested
Experimental calves
1	Holstein Friesian (HF)	I	50% A (2nd milking)+ 50% B (1st milking)	α	3
2	Crossbreed*	I	50% A (2nd milking)+ 50% B (1st milking)	α	3
3	HF	II	A (1st milking)	α	3
4	Crossbreed*	I	C (1st milking)	β	3
5	HF (twin of calf 6)	I	25% C (1st milking)+ 75% D (1st milking)	β	2
6	HF (twin of calf 5)	I	25% C (1st milking)+ 75% D (1st milking)	β	2
Control calves
7	Crossbreed**	III	From its own dam		3
8	Simmental	IV	From its own dam		3
9	Crossbreed**	V	From its own dam		3
10	HF	VI	From its own dam		3
11	HF	VII	From its own dam		3
12	HF	VII	From its own dam		3

* Brown Swiss × Belgian Blue; ** HF × Simmental; *** HF × Belgian Blue

All colostrum batches used were from 2009 Cows from which the colostrum was used: A and B had calves with BNP in 2008 and 2009;

C had a calf with BNP in 2008; the colostrum of 2009 was not used on the farm, only in the experiment; D had a calf with BNP in 2009