Table 2.
Mean number of pigs per farm at any moment in time and housing system for weaners, grower/finishers, lactating and dry sows.
| Stage of Production | Mean Number of Pigs ± Std. (Number of Farmers to Disclose) | Range | Housing Percentage (Number) | |||
|---|---|---|---|---|---|---|
| Indoor | Outdoor | Combined | Undisclosed | |||
| Weaners | 3252 ± 5736.8 (91) | 0 *–40,008 | 68.9% (84) | 5.7% (7) | 4.9% (6) | 19.7% (24) |
| Growers; | 3625.2 ± 4382.7 (92) | 0 *–23,300 | 74.6% (91) | 4.1% (5) | 3.3% (4) | 18% (22) |
| Finishers | 73.8% (90) | 2.5% (3) | 4.1% (5) | 19.7% (24) | ||
| Lactating Sows; | 959.6 ± 1722.4 (96) | 0 *–12,500 | 60.7% (74) | 14.8% (18) | 3.3% (4) | 20.5% (25) |
| Dry Sows | 62.3% (76) | 12.3% (15) | 4.1% (5) | 20.5% (25) | ||
* Some farmers reported keeping zero pigs either because they do not keep this stage of production or because they are now retired.