| Abbreviation | Definition |
|---|---|
| PSDU | Police Service Dog Unit |
| PSHR | Patriot Siberian Husky Rescue |
| PSPD | Peach State Performance Dogs |
| PT | Pre-trial Tested |
| PTDC | Professional Therapy Dogs of ColoradoProfessional Therapy Dogs of ColoradoProfessional Therapy Dogs |
| PUDA | Philippine Utility Dog Association |
| PWC | Pembroke Welsh Corgi |
| PWD | Portuguese Water Dog |
| PWDC | Portuguese Water Dog Club |
| PWDS | Portuguese Water Dogs |
| QDAC | Queenstown Dog Agility Club |
| QPO | Questionable Pet Owner |
| QWSD | Queen Walington Sausage Dog |
| R | Rabid |
| RACP | Réunion des Amateurs de Chiens Pyrénéens |
| RBC | Redbone Coonhound |
| RD | Ranch Dog |
| RIBC | Rhode Island Boxer Club |
| RKC | Richmond Kennel Club |
| RMGA | Rocky Mountain Greyhound Adoption |