In this form of slavery, which is commonly used for disciplinary purposes, or for the amusement of the Master, the woman is not permitted to arise from all fours; similarly she is not permitted human speech, though she may signify needs and desires by such means as cringing, and moaning and whimpering. Not permitted the use of her hands, save as a means of locomotion, she must also eat and drink from pans set on the floor, or, sometimes to satisfy her thirst, she must lap the water permitted to her from puddles or lick spillages from the tiles; too, it is no uncommon to chain her near her master's feet, while he dines, that he may, if he wishes, throw her scraps of food. She will also be taught tricks, through which paces she may be put for the entertainment of her master's guests, such things as begging, lying down, rolling over, and fetching his sandals in her teeth. And, needless to say, when her master wishes to use her sexually, it will be a position common to the she-quadruped.
"Guardsman of Gor" (page 225)

In this discipline the female is forbidden human speech. She is also forbidden human posture, in the sense that she is not allowed to rise to her feet. Her locomotion, unless commanded to roll, or put under similar commands, suitable for a pet, will be on all fours. Her food will be thrown to her, or put in pans on the ground. In either case, she must feed without the use of her hands. She may also, of course, be fed by hand, but, again, will not be permitted to touch the food with her hands. She may be taught tricks. Sometimes these are taught as functions of arbitrary sounds, so that she must learn them as any animal might, without the benefit of an earlier understanding of the word used. If she is slow to learn, of course, she is punished, as would be any other animal. When used, too, it will commonly be in the modality of the she-quadrupled. This discipline is often used as a punishment, but it may figure in the training of a new girl. It helps her to understand what she now is, an animal totally subject to her master.

"Mercenaries of Gor" (pages 215-216)

"Girl," I said to her.
She, addressed, scrambled to her knees. She kept her head down. She whimpered.
"She does not speak," said Boabissia.
"She is perhaps under the discipline of the she-quadruped," I said.
The girl whimpered, looking at us, nodding her head affirmatively. Then she put down her head, again.

"Mercenaries of Gor" (page 215)

Melina, now a naked slave in sleen collar, was ordered forth on her hands and knees. A sleen leash was attached to her collar and she was marched, as a she-sleen, crawling, abused, to the rape-rack.

"Slave Girl of Gor" (page 238)