Objective—To identify dietary and environmental risk
factors for hyperthyroidism in cats.
Animals—100 cats with hyperthyroidism and 163
Procedure—Medical records were examined, and
owners completed a mailed questionnaire. Data collected
included information regarding demographic
variables, environmental exposures, and diet, including
preferred flavors of canned cat food.
Results—Case cats were significantly less likely to
have been born recently than control cats. Housing;
exposure to fertilizers, herbicides, or plant pesticides;
regular use of flea products; and presence of a smoker
in the home were not significantly associated with
an increased risk of disease, but cats that preferred
fish or liver and giblets flavors of canned cat food had
an increased risk.
Conclusions and Clinical Relevance—Results suggest
that cats that prefer to eat certain flavors of
canned cat food may have a significantly increased
risk of hyperthyroidism. (J Am Vet Med Assoc 2000;