The colangitis, and the hepatic lipidosis, both common types but of feline diseases of the liver, can take to the fault of the liver if they do not treat in time. The colangitis is an inflammation of the biliary conduits and it is associated to the feline virus of the leukemia as well as feline infectious peritonitis. The conventional regime of the treatment includes antibiotics, stimulating of the appetite, immunosuppressive corticoesteroides and other drugs. The hepatic lipidosis, or the disease of the greasy liver, consists of abnormal fat levels certain that are accumulated near the liver. It is a idioptica disease (a disease whose exact cause does not know) that he is associate mainly to the loss of appetite and obesity. The tension, is also known for being one the factors that take to the loss of appetite. The cats find generally difficult to adjust to an atmosphere changed like the displacement to a new home or arrival of a new kitten. Estan in tension even when the owner this in tension. There are occasions of the occurrence of the disease of the greasy liver due to the colangitis, inflammation of the pncreas, as well as a hepatic tumor. Like in many other conditions of health, the prevention is better than the treatment. It considers natural supplements and remedies herbal that support the health of the liver. Also there are natural remedies for mascots that help in reducing to the tension and anxiety, as well as to help him in the handling of the weight. The exact diagnosis for dogs of a disease of the liver and the cats are with a biopsy. The cats with disease of the greasy liver are an anesthetic risk and a sample takes shelter normally with the aid of fine a percutnea or laparoscopica needle. The hepatic lipidosis needs to be taken care of immediately to avoid fault of the liver.