The phrase "unsound temperament" refers to someone having unpredictable or unstable behavior or attitudes.
Sentences with «unsound temperament»
Refuse stud service to any bitch that is unregistered or any bitch I consider in poor health, of unsound temperament, or of having serious hereditary faults. (canadianscottishterrierclub.com)
No dogs exhibiting a hereditary defect, unsound temperament or poor health will be bred. (westiesocietyofct.com)
This leads to many of these dogs developing congenital issues and the risk for being surrendered or re-homed due to unsound temperaments. (notinthedoghouse.com)