
Shouldn't make any difference, as otherwise none of us would have ever won with our younger dogs whilst showing the older ones.
I still show my RCC winning bitch even though I am showing her champion daughter and granddaughter, as she likes being shown, and I like showing her.
To be hones you could just point her at the ring and she would show on her own.
Tend to enter Veteran classes with her, and she is a great Junior handlers dog.
Her Mother never won much at championship shows, but woudl always place in quite good classes, and ehr mother managed to win her stud book number.
Generally your younger dogs are in the lower classes to begin with, so the judge won't ahve seen your other dog to affect their opinion, and to be honest they shouldn't be looking at the handler.