Recommendations for fixed tissue collection:
| Tissue type | Number of samples to collect (min) | Tissue type | Number of samples to collect (min) |
| Tongue | 1 | Adrenal glands | 2 (both whole) |
| Oesohagus | 1 | Kidney | 2 (section from each) |
| Trachea | 1 | Urinary bladder | 1 |
| Thyroid glands | 2 (whole or section both) | Liver | 2 (from separate lobes) |
| Lung | 4 (different lobes) | Spleen | 1 |
| Heart | 1-2 (include all 3 walls) | Stomach | 1 |
| Thymus (if present) | 1 | Duodenum | 1 |
| Pancreas | 1 | ||
| Sciatic nerve | 1 | Jejunum | 1 |
| Skeletal muscle | 2 (fore and hind limb) | Ileum | 1 |
| Colon | 1 | ||
| Brain | Whole | Mesenteric lymph node | 1 |
| Spinal cord | If relevant | ||
| Bone marrow | 1 (from femur) | Reproductive organs | 1 of each (whole ovary) |
Note: Ensure all fixed tissue is placed in formalin (ratio tissue:formalin must be at least 1:10).
Fresh tissue recommendations – if suspect poisoning/toxicity, vitamin/ mineral problem (place in separate yellow pottle): Fat, stomach contents, liver, kidney, skeletal muscle