Hi Pippa
I understand your way of thinking & did very similar to what you are thinking 4 years ago but my advice would be to do your homework
properly , get as much advice as you can, get to know other more experienced breeders but even then, concider very carefully your reasons for breeding from your bitch.
Please meet my Tinker...
She was one of the pups from the litter I bred from my bitch Purdey. She isn't a cross breed but pure bred with a pretty good pedigree. I did all my homework & had the advice & support of long standing breeders. Despite the possibly problems during pregnancy, whelp & with the litter when they are born (still birth, bitch needing Cesarean, cleft palates, hermaphrodites, incomplete anus& more) we decided to go ahead & have a litter in the hope we would have an orange roan girl to keep & show. In the litter of 9, we did indeed have an orange/white bitch, who we have also kept called Livie & a lovely girl she is too
However Tinker & one of her litter brothers were born with microphthalmia - a condition where the eyes don't develop properly & Tinker had the most severe from of it
She is blind but also had an elongated soft palate, nasal deformities & has horrendous trouble breathing at times. In December last year she went to the vets to have one eye removed (when I say eye- it wasn't an eye as you imagine but just a red mass) the palate on the roof of her mouth adjusted & spayed at the same time. None of Tinkers treatment is covered under insurance as she born with it (existing conditions) & the OP cost nearly £1000.
She is a beautiful awesome little character & I can't regret for a moment what I did & chose not to have her PTS as was offered BUT there are conditions & situations that you nor I have any control over & is always a possibility when breeding. You need to be aware & prepared for so many eventualities - it really isn't something to do on a whim or because you think 'it would be nice to do'.
Peoples opinions on the forum are strong but for all the right reasons, with the welfare & wellbeing of the breed as paramount - please don't be angry or upset if opinions aren't what you wanted to hear - it is a emotive subject & one thats is important for you to listen & learn from, if you should choose to continue down the breeding route
best wishes
Lindsey x