I’ll start from the other side of things.
many pasture grasses, clovers, alfalfa’s, etc are accustomed to a 30 day rotation. They grow well for 30 days,them progress to setting seed and such, no longer growing much feed value.
so, an ideal rotation is to have 30 pastures, and rotate your critters onto a new pasture everyday, and have enough critters to mow down the pasture paddock in that one day.
yea, right, like that will happen! Ha.
but, this is what you want to accomplish.
you want your grass grazed down nice and even, and then left alone for 25-35 days.
if you have 4 paddocks, so be it,try To use each paddock every month and try to get it resting and regrowing for a month.
you can also do a lot by turning the critters out on a pasture during the evening, and getting them off in the morning, so the pasture can regrow over the day. With 4 paddocks, you can rotate between thrm.
having more paddocks makes all of this more efficient, easier to rotate. But obviously costs more in fencing and takes more planning to allow access to water and the home yard and barn.
so........
if you plan ahead to allow current pasture to be divided into say, 8 paddocks, or 12 paddocks, and onlyget divided into 3 or 4now, it will make future fencing a lot easier if you have an early plan of how to make more paddocks.
many of us just raise a bunch of critters on waste land with a fence around it and let them graze the whole thing. That works too. It just isn’t the most efficient. What happens is the critters eats the tastiest grass. Critters tend to like young tender grass, and so they will keep grazing the same patches over and over. They let the less tasty grass alone, it grows over ripe and goes to seed. Over time, the critters end up decreasing the amount of good tasty type grass, and the pasture is overtaken with the poorer grasses and weeds they don’t want to eat. This makes your pasture less and less efficient, less productive.
Paddocks and rotation allows you to eat down a whole pasture so all the grasses and weeds get trimmed down and used, while other paddocks are regrowing and the good grasses are getting healthy and strong again. As well the manure from grazing gets spread over the whole pasture, to refertilize everything, not just overworked patches in the pasture. This can about double the number of critters a pasture can feed.
Paul