posted 8 years ago
It does not work that way because grass does not grow that way. It grows in cycles, really cranking out in the spring months and then slows after that. Our grazing season is shorter than yours, but in Maine, in May you can practically watch the grass grow, so in that month you move animals often. But in the dog days of summer, the grass slows down, so a farmer needs more area in which to graze since the livestock eat the same amount per day, but what is available may not be. Naturally you can bring in supplemental feed, but this brings on two issues. The first is added cost, and the second is manure build up.
A lot of people do not consider this, but when you have so many animals that the land cannot feed them, and added feed has to be bought, the land is being over-saturated with manure. A sheep or goat poos 85% of what it eats back out. This goes back into the soil and replenishes the forage, but when there is too many animals for the given land they are on, its starts building up. Then when the next rain comes, it gets carried off down the watershed instead of into the soil. Now as long as that manure is carted off periodically, all is okay, but when it sits in a big pile for years on top of soil, its not good. Neither is having animals grazing a micro-pasture and supplementing feed all the time. They might be dispersing their manure, but its not over enough acreage.
Your stocking rate is low enough, at least for Maine. Here we can graze 7-10 sheep per acre per year. That is based on set-stocking . Now I don't know of anyone who set-stocks or even advocates it, but it is an average derived from how many sheep or goats you can put on a given acre for the duration of the grazing season. When rotational grazing, you actually don't go by the amount of time they are in a paddock, but rather what the height of the grass is after grazing. That is what determines when they move. In the fall this might happen slowly because the growth just is not as fast as spring, so in your case you would open up two paddocks instead of one and let them graze more land for a longer period of time.
But no animal can stand being in lactation (milk) constantly. I honestly don't have goats, I have their close cousins sheep, and I wean mine at 60 days just because lactation is so hard on them. My sheep need rest so they can get their nutrition levels back up as they prepare to get bred and have a high demand for feed while going thought gestation again. You can stretch it out longer, but it negatively affects the life span of the animal. The way around that is to have different animals bred at different times so you can have one goat giving milk at any one time.