Other than for hospital, transport or brooders, I prefer not to use wire-bottom cells for birds. Some alternatives to wire bottoms -
The aviary above housed Gambel Quail with Finches & Lovebirds. The mesh was hardware cloth for the finches, which did break when the first heavy snow came that first year it was built. Repairs forced movement of the quail (finches were already inside), aviary is 16 wide, 16 long, 8 high. An adjustment for those without finches, use hardware cloth along the bottom 36" to keep snakes out & parent reared chicks in and 1" chicken mesh around the rest.
Some examples of plants in an aviary.
2 male button quail near a feeding station in a ground aviary.
This aviary belongs to a friend of mine who keeps his Bobwhite on the ground, year-round. Here he added raked leaves to the aviary and the birds spent many days scratching and picking at the leaves. Great enrichment!!
I have been criticized for this by others in the "game bird world" , but totally feel and will always promote & encourage, that the birds in our care - particularly wild galliformes - need to be kept in aviaries that enrich their quality of life and simulate their natural environs as much as possible. Good sanitation is a part of good husbandry, with it, you will not have the disease problems that the wire jails are used to prevent.