The kidneys cleanse the blood of harmful substances and help to remove nitrogen. If a cat has problems with the kidneys, this should be treated as soon as possible.
Acute kidney failure is a real emergency and must be treated immediately by a veterinarian. The cat produces a reduced amount of urine, usually followed by extreme thirst. They suffer from pain in the stomach and lower spine, and dark urine, sometimes containing blood. Usually their overall well-being is severely impaired and the animals are apathetic and/or no longer eat. This dramatic condition can occur as a result of an accident with high loss of blood, after serious infections, and also after poisoning with heavy metals, antifreeze or medication.
Firstly, emergency veterinary care with infusions and diuretic drugs is essential, followed by treatment of the underlying disease, if necessary with antibiotic therapy lasting several weeks.