Between 12 and 36h after birth, piglets were tattooed and cross-fostered
taking into account similar weights.
Piglets were cross-fostered
across treatments within 3 d after birth to balance suckling intensity across sows with equalization of litter size, and thus to minimize any impact of initial litter size potentially affecting litter growth.
If a dog's littermates were divided and cross-fostered
with other females, the dog would still recognize a littermate.
Though uncommon, studies of developmental patterns of heterospecific cross-fostered
birds may be particularly helpful in elucidating differences in reproductive life history strategies among similar species, and the plasticity of developmental traits when reared under different conditions (Slagsvold, 2004).
The individuals nesting at the refuge are very likely descendents of Newell's shearwaters that were brought here 30 years ago as eggs and cross-fostered
by the much more common wedge-tailed shearwater (Puffinus pacificus)," Zaun explains.
These investigators exposed rats prenatally to a single oral dose of TCDD, cross-fostered
the animals to eliminate lactation exposure, and treated the pups at sexual maturity with DMBA.
To check that this was so, we also cross-fostered
the third-laid egg of 43 control nests from one nest to another in the same way, and over the same period (3 May to 6 June), as for experimental eggs.
the animals so they were raised by mothers from the wrong species.
Heritability of blue tit tarsus length from normal and cross-fostered
Whenever needed, piglets were cross-fostered
among sows only within a dietary treatment within 24 h postpartum to standardize litters to approximately 10 pigs.
The sample of cross-fostered
litters, in addition to the constraint of synchronous births, was chosen so that the number of neonates in the transferred litter was as close as possible to the original litter size of the foster mother.
At birth, we cross-fostered
up to four pups per dam between two or more dams who had given birth on the same day.