Mae rhai cŵn a chathod bach sy’n cael eu gwerthu gan drydydd parti yn gorfod teithio’n bell a newid dwylo nifer o weithiau gan orfod dygymod ag amgylchiadau newydd, a hwythau’n ifanc iawn.  Mae hynny’n gallu arwain at broblemau iechyd, stres a diffyg cyfleoedd i gymdeithasoli.
Puppies and kittens sold through a third party  may have to travel long distances and change hands many times while experiencing several new environments at a very young age.  This has the potential to contribute to an increased risk of health problems, stress and lack of socialisation.