Poor trainability (Behaviour assessment)
Portosystemic (portasystemic – portacaval) shunt disorder
Post-anaesthetic myelomalacia
Polioencephalomyelitis
Polyarthritis – acute
Polyarthritis – chronic
Polycystic ovary(ies)
Polycythaemia (type unspecified)
Polycythaemia vera
Polycythaemia – secondary