Congestion of the Liver
(a)Active congestion—that is when an increased amount of blood is brought to the liver 
byte Hepatic artery
(b)Passive congestion—when there is in-dereference with the circulation of the Portal vein and its branches
(c) Billiard congestion—that is when there is interference with the circulation of Portal vein and its branches.
(a) Active congestion may be brought about when irritating and stimulating materials absorbed from the alimentary tract and especially excessive nitrogenous food such as Brewer’s and Distiller’s grains. It is also conduced to lack of sufficient exercise and is most frequently met in animals that are being overfed and underworked and for show purpose animals.
Symptoms: are very indefinite and may con-sits of slight additional pain which is most evident after_ meals with a slight rise of temperature and general depression. This is followed by the general symptoms of indigestion.
(b) Passive congestion of the Portal vein and its branches may be caused by anything which diminishes the flow of blood from the liver on the one hand ‘or anything which diminishes the force of the blood travelling ups the Portal vein to the liver. Examples of the former are met with incompetence of the right side of the heart causing regurgitation into the vein, e.g. chronic obstructure lung disease.
Symptoms : Dullness and depression followed by indigestion, irregular appetite and bow-ells with a tendency to constipation. The feces very offensive in odor due to insufficient secretion of bile. Mucous membranes are dirty yellow-is in color and the pulse is soft and slow. Vomiting in dogs and cats are frequently met with There is usually some enlargement of the liver.
Treatment: Horse—First give a purgative, calomel probe-ably gives the greatest relief. This may be fool-lowed on subsequent days with Mag. Sylph.
Cattle and Sheep—A combination of Mag.Sulph. And Soda. Sylph. Gives the best results followed by Amman. Curb. And Nix Vim.
Dogs and Cats—it is a good plan, first to give an emetic such as Apo morphine Hydrochloric-ride—hypodermically. The act of vomiting exerts mechanical pressure on the liver and may thus reduce the congestion and accelerate the circulation. This should be followed by calomel and subsequently Mag. Sylph. And Soda. Sylph. Maybe given daily in small doses. When dropsy is present, the abdomen may be tapped, water sup-ply curtailed. Attention must be paid to the diet, which should be somewhat restricted for a day or two and of a laxative and easily digestible character.