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Intraclass coefficients, how strongly the puppies within a litter resemble each other
| 7 weeks | 12–13 months | 15–18 months | Mean | |
|---|---|---|---|---|
| Faecal IgA | 0.62 | 0.12 | −0.04 | 0.24 |
| Serum IgA | 0.25 | 0.48 | 0.45 | 0.43 |
| Serum IgE | −0.01 | 0 | 0.1 | 0.11 |
| IgG against CDV | 0.61 | 0.27 | 0.20 | 0.41 |
The closer to 1, the stronger is the litter effect
CDV, canine distemper virus
