The urethra is a tube leading from the bladder to the exterior, serving for the passage of the urine.

Sometimes it is the seat of obstruction or stricture, i.e., a narrowing of it.

Congestion, spasmodic contraction, and organic changes are the principal causes.

The chief sign is the passage of urine in drops, together with pain.

Give a hot bath, 20-drop doses of chlorodyne in a little water, and consult a qualified veterinary surgeon.