If two or more breeding pens are maintained, they must be isolated from each other. This can be done with double fences, 12 feet or more apart, or with single fences built solid for about 3 feet above the ground, so that the turkeys cannot see those in other pens. MATING Best results in mating are obtained when from 10 to 15 females are mated to 1 male, although as many as 18 hens can be mated to 1 young tom under favorable conditions. As a rule good fertility will result when several toms are kept with a flock of hens. However, if the toms are quarrelsome and mating is seriously interfered with the males must be alternated, 1 tom being allowed to run with the hens 1 day and another tom the next day. Surplus toms should be penned out of sight of the breeding birds. [Illustration: Figure 8.--Breeding flock of Bronze turkeys on free range.] The soundest breeding program is one of using yearlings and 2-year-old hens which have been selected as breeders alter they have passed through one full breeding season successfully. However, if pedigreeing can be done, it is practicable to use well-matured pullets selected from parents that lived through their first breeding season and showed good production, fertility, hatchability, and poult livability. The breeding males may be young or old but, in general, well-matured young toms give better results. Proved sires, of course, are valuable and can well be used so long as they will breed. Reserve breeding toms should always be kept, especially when older toms are used, as the latter are sometimes sterile. The spurs of a yearling or older tom should be trimmed smooth, as should the toe-nails of all breeding males, regardless of age, to avoid needless tearing of the backs of the females. All breeding hens and toms that are not to be used for another breeding season should be marketed about June 1. If older hens are used in breeding, it is advisable to replace 3-year-old females with young birds, since egg production decreases rapidly after that age. Immature stock should never be used but, as mentioned before, well-matured young toms and pullets make good breeders especially if trap nesting and pedigreeing can be carried on, thus enabling the breeder to cull properly and sell as market birds the offspring of all hens that die during their first laying season. It is not advisable for the average producer to inbreed turkeys, as this practice has been found to lower the vitality of the stock. When only one breeding pen or flock is kept, it is advisable to obtain new blood every season from a reliable outside source. EGG PRODUCTION