Thyroid Function & Screening

Comprehensive thyroid evaluation is a pillar of responsible Boxer breeding. We monitor baseline levels and antibody markers to ensure long-term endocrine health.

Protocol: DNA Sample Collection

Diagnostic Protocols

TSH (Thyroid Stimulating Hormone): The primary marker used to identify secondary hypothyroidism originating from the pituitary gland.
Free T4 by Equilibrium Dialysis: The most accurate measure of active thyroid hormone, minimizing interference from non-thyroidal illness.
TgAA (Thyroglobulin Autoantibody): A crucial indicator for lymphocytic thyroiditis, the most common cause of canine hypothyroidism.
T3 and T4 Total Panels: Baseline markers that provide a comprehensive view of overall thyroid production levels.

Result Interpretation Guide

Normal Range

Euthyroid function; no clinical intervention required.

Low FT4 / High TSH

Primary Hypothyroidism; clinical management likely needed.

Understanding Thyroid Results

Comprehensive thyroid screening is important for identifying autoimmune thyroiditis, the primary cause of hypothyroidism in Boxers. Our guide helps you interpret the essential markers used in diagnostic panels.

T4 (Thyroxine)

Marker

Measures the total amount of thyroxine in the blood. Low levels may indicate hypothyroidism, but can be affected by other non-thyroidal illnesses.

TgAA

Marker

Thyroglobulin Autoantibody. A positive result indicates hereditary autoimmune thyroiditis even if hormone levels are currently normal.

Free T4 (fT4)

Marker

Measures the unbound thyroxine available to tissues. This is the most accurate baseline test as it is less influenced by other health factors.

T3 (Triiodothyronine)

Marker

Measures the active form of thyroid hormone. Often used to detect autoantibodies that might falsely elevate T4 readings.

cTSH

Marker

Endogenous Canine TSH. High levels usually confirm primary hypothyroidism when combined with low T4 levels.

Full Panel

Marker

A comprehensive assessment including T4, freeT4, TSH, and TgAA. This is the only reliable way to clear a breeding dog for genetic soundness.