She'll respond best to a new name which has the first consonant sound as her old name. Lankeela's example above is a happy case in point.I've a bitch here whose name is Mary but she has answered to 'Mum too', ever since she had her first litter, which seemed both intelligent and sweet but, in reality, it wasn't her knowing she was now a mum but her doggy undertanding that it began with M and was evidently something which she, and not one of the others, was expected to respond to (the tone of voice part).