My cat is 15 years old and weighs 18.3 pounds. The vet perscribed 200 mcg of thyro-tabs to treat possible hypothyroidism. After a few days she began having difficulty breathing and had coughing spells. Is this the beginnings of CHF (congestive heart failure)?
Difficulty breathing is a clinical sign of heart dz but it is also related to pulmonary dz. I recommend that you visit your vet. vetcare