
Initially, the veterinarian will draw a fair amount of blood and replace it with intravenous fluids to decrease the blood's viscosity. However, this is only for quick relief. Long-term therapy, for both animals and humans, involve using an antineoplastic drug called hydroxyurea, which suppresses the overproduction of red blood cells in the bone marrow.
During treatment, your veterinarian will need to see the dog for regular follow-up exams, especially when it is taking hydroxurea, as it may sometimes cause bone marrow suppression. In addition, follow the veterinary oncologist's dosage recommendation when using on chemotherapy medications, such as hydroxurea, because these drugs are highly toxic.