Detected ICM concentration did not change over time when held at 4°C for up to 16 h before freezing (−20°C). Linear regression: ng ICM/g dry feces = 0.0152 × hours prior to freezing + 187.635 ng/g, R2 = 0.0000, F ratio = 0.0001, P = 0.9914, n = 7. Additionally, mean ICM values for each time point were not statistically different from one another (ANOVA, P = 0.8997).