
As well as what Sharon has wriiten, are you prepared for:
10+ puppies, not everything to go to plan with the whelping, you will need to take time off of work as she may whelp early or late, she may need a Caesarian, you may need to hand rear some/all the pups. Some may die on you or not survive birth, can you cope with that?
If it's a big litter weaning will have to start early - 2 weeks - and after that you'll never take your hand out of your pocket because they eat like nothing on earth as well as mum needing 3 times her usual amount. Then there's the cost of a stud fee, the hip & eye testing, KC registrations (£12 per pup), a KC affix if you apply for one, vet bedding, whelping box etc.
The disruption to your household - they poop and pee for Britain, the destruction to your garden, stopping one puppy doing something is hard enough when it's 12....give up!
That's just the start of it....maybe buying in one is easier and leave someone else to do the hardwork?????