Figure 1.

Scatterplot of hepatic copper concentrations (μg/g) in Labrador Retrievers from 1982–2015. Black circles represent individual data points. Dashed lines represent hepatic copper concentrations of 300 μg/g and 1000 μg/g. It should be noted that copper concentrations exceeding 1000 μg/g were observed in approximately 25% of Labrador Retrievers undergoing hepatic tissue sampling beginning in the mid to late 1990s