A companion animal is just another word for a family pet. Think Fido and Fluffy. At Pets for Patriots, we celebrate the extraordinary, innate therapeutic abilities of the everyday companion dog or cat.
1 per se (Latin), a Latin phrase meaning by itself or in itself. 2  Illegal per se, the legal usage in criminal and anti-trust law.  Negligence per se, legal use in tort law.
Terminology [edit]. Per os (/ËpÉrËoÊs/ ; P.O.) is an adverbial phrase meaning literally from Latin by opening or by way of the opening.. The expression is used in medicine to describe a treatment that is taken orally. The abbreviated P.O. is often used on medical prescriptions.