in chapter ten, how has the farm grown after several more years?

Many of the animals alive at the time of the rebellion are now dead. The windmill has been completed and another is in mid-construction. Everyone continues to work (even unto old age) except the pigs; they even walk on two feet now. The farm is rich and getting richer; the farmers now socialize with Napoleon and the other pigs; Animal Farms returns to its former name (Manor Farm), and in the end there's no telling the pigs apart from the humans. They've all blurred into one.