| Rank Among Breeds | Number of Dogs Tested | Percent of Dogs With Disease |
| #13 | 17083 | 15.7% |
The Cocker Spaniel ranks number 13 among all breeds for autoimmune thyroiditis prevalence. There is a high risk for obtaining a dog that will develop thyroid disease, so you should make sure you or your breeder is testing their dogs prior to breeding.
For information about this breed, from the American Kennel Club, visit http://www.akc.org/breeds/cocker_spaniel/
You can download the full report (on all breeds) by the Michigan State University Diagnostic Center for Population and Animal Health. Here