Why is my dog peeing blood and having seizures? Is it serious?
I'm so sorry to hear that. Bloody urine can have a number of different causes. It can be due to a problem in the urinary tract-- such as a severe urinary tract infection, bladder stones, or a bladder tumor. Those things may also cause her to urinate frequently in small amounts and/or strain to urinate (but not necessarily). It could also be a problem higher up in her urinary tract--in her ureters (tube from kidney to bladder) or in her kidneys-- again an infection, stone or tumor.
The other potential cause of seeing blood in the urine is if she isn't able to form a blood clot properly. If her blood platelets or clotting factors are low or are not working correctly, bleeding can occur within the bladder (or anywhere in the body--bruising under the skin, bleeding around the gums, blood in the stool, bloody nose, blood in the eyes).
We can also sometimes see the urine look bloody when its actually a different thing causing the pigment (color). For instance, if she's destroying her red blood cells and the pigment (color) from the red blood cells which is the hemoglobin is ending up in her urine. Also myoglobin (which occurs with massive muscle damage) can result in dark reddish brown urine. Some types of toxic ingestions can also result in reddish brown urine.
The seizure on Sunday makes me more concerned that something very serious is going on with her. If she's unable to clot her blood properly she could have a bleed in her brain. Or the seizures may be completely unrelated to the urine.
I wish I could offer you a suggestion to treat her at home, but it sounds like you need to have her seen by a veterinarian as soon as you can.
Updated on September 23rd, 2025