J Vet Intern Med, 1991. 5: p.129.
We recently reported that the triiodothyronine (T3) suppression test is a useful aid in that diagnosis hyperthyroidism in cat, especially when basal serum thyroid hormone concentrations are high normal or only slightly high. The major advantage of the T3 suppression test is that it relies on owner compliance to give the oral medication over the three-day period of the test, as well as the willingness of that cat to swallow the pills. In human patients, the TRH stimulation test, in which the serum TSH response to an IV injection of TRH is monitored, has generally replaced the T3 suppression test.