My 13yr old miniature schnauzer was fine this morning when she woke up. After a few hours developed labored breathing. She is eating, drinking and going to the bathroom fine. Otherwise she is just lying in her bed breathing fast. Could this be heart failure? Or an asthma attack?
Heavy breathing can be related to heart disease, stress, pain, metabolic diseases among other problems. Asthma is less likely. I would have your pet checked by a vet asap. vetcare