In our current location we are considerably limited in the number of adult animals we can have at any given time. We currently run 4 adult does, with 2 Jr does growing out, and 2 adult bucks (a jr is in selection currently). It is a good idea as you figure out what you want to grow out juniors, either to replace a breeder that isn't completely up to what you want, or to replace a breeder that begins to fail. With this number and our current location we can have 2 litters in grow out at any given time. So we use the following schedule:
Week 1 - Breed Doe 1 & Doe 2
Week 5 - D1 & D2 Due
Week 8 - Breed Doe 3 & Doe 4
Week 12 - Wean L1 & L2
Week 13 - D3 & D4 Due
Week 18 - Butcher Litter 1 & Litter 2
Week 19 - Rebreed D1 & D2
Week 20 - Wean L9 & L10
This gives the does 1.5 months between nursing litters. There is a lot of down time, but it works for our situation. We always breed 2 does so that if anything goes wrong there is another to foster.
We are looking to expand. It means changing locations but we would like to do more. We would like to get to a point of having 12 adult does and 2-3 adult bucks.
To give you an idea of the schedule we believe we will use with that setup here is a 21 week schedule for 12 does. It gives the doe a month off from nursing and a week between butchering for us.
Week 1 - Breed D1 & D2
Week 2 - nothing
Week 3 - Breed D3 & D4
Week 4 - nothing
Week 5 - Breed D5 & D6 - D1 & D2 Due
Week 6 - nothing
Week 7 - Breed D7 & D8 - D3 & D4 Due
Week 8 - nothing
Week 9 - Breed D9 & D10 - D5 & D6 Due
Week 10 - nothing
Week 11 - Breed D11 & D12 - D7 & D8 Due
Week 12 - Wean L1 & L2
Week 13 - Rebreed D1 & D2 - D9 & D10 Due
Week 14 - Wean L3 & L4
Week 15 - Rebreed D3 & D4 - D11 & D12 Due
Week 16 - Wean L5 & L6
Week 17 - Rebreed D5 & D6 - D1 & D2 Due
Week 18 - Wean L7 & L8 - Butcher L1 & L2
Week 19 - Rebreed D7 & D8 - D3 & D4 Due
Week 20 - Wean L9 & L10 - Butcher L3 & L4
Week 21 - Rebreed D9 & D10 - D5 & D6 Due
It is a little slow to start, but would eventually be a "something happening every week" schedule. It is methodical, it works for my brain.
Some people prefer to breed-back right away and wean at 4 weeks. Some prefer to wean at 8 weeks. Most of my mothers have told me that they were done around 5-6 weeks, hence the schedule I use. Start small play with it, let your animals be your guide. "The best laid plans of mice and men..." Always be open to change.