https://www.vetsurgeon.org/f/clinical-questions/15578/coagulation-problems-in-rats-of-specific-coat-colours One of our rat breeders has contacted me about screening for coagulopathy in a female rat, which may be used for breeding at a later date. Apparently there are concerns about colour linked coagulopathy in certain lines. I can find reference in some ofen-USTelligent Community 10