Determinants of Iron, Zinc, and Copper Concentrations in the Hair of Dogs and Cats

This study investigated the concentrations of iron (Fe), zinc (Zn), and copper (Cu) in the hair of clinically healthy dogs and cats in Bucharest, Romania, focusing on individual and environmental factors. Dogs had higher hair Fe and Cu levels than cats, while Zn levels were similar between species. The living environment significantly influenced Fe levels, with outdoor animals having higher concentrations than indoor ones, but did not affect Zn and Cu levels. No significant effects of sex, age, or diet type were observed. Positive correlations among Fe, Zn, and Cu were found, with Zn-Cu showing the strongest association. These results enhance the limited data on hair mineral profiles in companion animals and suggest hair analysis as a tool for assessing environmental impacts and trace element interactions.