
" aren't you helpful" , deary me, we are dammed if we do dammed if we don't somedays.
You asked a question ,and probably is the answer. You didn't give us much to go on did you??
Never mind.. :-( gratitude...
If you keep dogs together as a family that is exactly how they regard each other it is very common for them not to mate.
The best person to talk to about breeding your pet westies really is the breeders of the dogs. They can give you the best advice and also tell you if they are suitable mates.