Table 1.
Summary of the farm survey questionnaire responses with respect to practices relevant to the study.
| Farm ID | Layer replacement (and age of purchase if growers/pullets) | Age at commencement of lay (weeks) | POL vaccine administered | Age vaccinations given (weeks) |
|---|---|---|---|---|
| 1 | DOC | 19 | IND_2 | 4/17 |
| 2 | DOC | 20 | CHI_3 | 5/15 |
| 3 | DOC | 19 | MEX_1 | 6/17 |
| 4 | DOC | 20 | CHI_2 | 4/9/12/17 |
| 5 | DOC | 19 | IND_1 | 2/5/10/17 |
| 6 | DOC | 20 | CHI_3 | 3/8/14/22 |
| 7 | Growers (12w) | 19 | CHI_3 | nk/14 |
| 8 | Pullets (14w) | 20 | IND_2 | 4/12/16 |
| 9 | DOC | 19 | MEX_1 | 6/17 |
| 10 | Pullets (14w) | 18 | IND_1 | nk/16 |
| 11 | DOC and Pullets (14w) | 19 | CHI_1 | DOC: 4/10/18 Pullets: nk/18 |
| 12 | DOC | 19 | IND_2 | 3/9/18 |
| 13 | DOC | 20 | CHI_2 | 4/9/20 |
| 14 | DOC | 19 | CHI_3 | 4/9/20 |
| 15 | Pullets (14w) | 20 | MEX_2 | 4/12/20 |
DOC, day-old-chicks; nk, not known; POL, point-of-lay.