Hyperthyroidism causes a range of symptoms. It can cause vomiting and gastric upset, which may be the cause of the foul-smelling stool. It also often comes along with kidney disease. The kidney disease is usually not seen on the initial bloodwork that diagnoses the hyperthyroid because the increase in thyroid function ‘masks’ the kidney disease. Your kitty’s blood pressure may be elevated because of hyperthyroidism, which increases the blood perfusion to the kidneys; this helps to keep the kidneys functioning well.
Once treated for hyperthyroidism, many cats will begin to show signs of kidney disease in their follow-up bloodwork when the blood pressure is brought down to normal levels. With all of this in mind, blood in the urine isn’t necessarily a symptom of kidney disease. It can be due to urine crystals or a urinary tract infection. Sometimes, blood in the urine seen at the lab can be caused by the collection method, and it is not an immediate concern. If your kitty’s urine was quite diluted, this may be why your veterinarian was leaning towards kidney disease. As far as supplements, for hyperthyroidism, we recommend NHV Resthyro. This should be given along with the veterinary-prescribed medication for hyperthyroidism. If you decide you would like to wean your kitty off the medication, please only do so with a veterinarian’s guidance and regular T4 level monitoring. For kidney disease, NHVTripsy would be beneficial and provide overall support.