Tim Pasma, Jennifer Zoethout

Animal Health Laboratory, University of Guelph, Guelph, ON.

AHL Newsletter 2025;29(4):4.

Cold weather shipping

As winter approaches and the weather becomes colder, please remember to package submissions to prevent freezing of samples. Freezing will damage samples such as EDTA blood and cause artifacts in formalin-fixed tissues. In cold conditions, please use an insulated package with an ice pack at room temperature to help keep samples from freezing. To prevent formalin from freezing, add 1mL of ethanol per 10mL of formalin.