| External biosecurity (n = 9) | Purchasing policy/gilts acclimatisation (n = 8) | 73 (20–100) |
| Removing of animal carcasses (n = 2) | |
| Vermin control (n = 1) | |
| Internal biosecurity (n = 20) | Suckling period management (n = 9) | 75 (0–100) |
| Farm compartmentalising, working lines (n = 6) | |
| Cleaning and disinfection (n = 6) | |
| Vaccination scheme (n = 30) | Altering of existing vaccination protocols (n = 5) | 88 (0–100) |
| Implementation of a new vaccination (n = 29) | |
| Feed or water quality or composition (n = 45) | Feed additives zinc/metal (n = 18) | 87 (0–100) |
| Feed scheme revision (n = 10) | |
| Feed and water acidification (n = 12) | |
| Cleaning and disinfection of water pipes (n = 7) | |
| Feed additives phytotherapy and other additives (n = 14) | |
| Feed quality improvement (e.g. change in fat, protein or fibre content) (n = 5) | |
| Feed additives pre- and probiotics (n = 4) | |
| Water quality control (n = 3) | |
| Pig health care (n = 21) | Increased diagnostics (n = 7) | 89 (0–100) |
| Alternative treatments protocols in case of symptoms (e.g. with anti-inflammatory products or prostaglandins) (n = 5) | |
| Revision of deworming scheme (n = 4) | |
| Stopping surgical castration (n = 3) | |
| Hospital pens put in place (n = 3) | |
| Euthanasia of runt suckling piglets (n = 1) | |
| Pig stable climate and other zootechnical measures (n = 14) | Climate adjustments (n = 7) | 100 (20–100) |
| Change of genetics (n = 2) | |
| Animal transfer adjusted (avoidance of re-mixing of piglets or having pens with heterogeneous pigs (n = 4) | |
| Building renovations (n = 3) | |
| Reduced pig density (n = 2) | |
| Farrowing processed slowed down (n = 2) | |
