This section is from the book "The Dogs Of Great Britain, America, And Other Countries. Their Breeding, Training, and Management in Health and Disease", by John Henry Walsh (Stonehenge). Also available from Amazon: The Dogs Of Great Britain, America And Other Countries.
If a small quantity only is to be given, the dog's head being held, the liquid may be poured tarough the closed teeth by making a little pouch of the cheek. This, however, is a tedicus pro cess, as the animal often refuses to swallow the medicine for a long time, and then struggles until half is wasted. A spoon an swers for small quantities; for large quantities a soda-water bot tles is the best instrument. Having the dog held on either of the plans recommended in the last paragraph, pour a little of the fluid down his throat, and shut the mouth. This is necessary, inasmuch as the act of swallowing can not be performed with the mouth open. Repeat this, until all the medicine is swallowed. Then watch the dog, or tie up his head until it is certain that the medicine will be retained on the stomach.
When the bowels are very much confined, a pint or two of warm gruel will, if thrown up into the rectum, often be of great service. The dog should be placed on his side, and held in this position on a table by an assistant, while the operator passes the pipe carefully into the rectum, and pumps up the fluid.