. Cyclopedia of farm animals. Domestic animals; Animal products. Heredity is, perhaps, of all factors the most potent in determining the inherent ability of ani- mals to produce young in abundance. It is pos- sible, by selecting the females from large litters, to increase the fecundity of our ani- mals. Twin-born fe- males from species nor- mally producing one young at a birth will tend to reproduce this quality in their off- spring. An exception to this is to be noted in the case of twins born to a cow in which one is a bull and the other a heifer. In such cases the heifer is usually sterile
. Cyclopedia of farm animals. Domestic animals; Animal products. Heredity is, perhaps, of all factors the most potent in determining the inherent ability of ani- mals to produce young in abundance. It is pos- sible, by selecting the females from large litters, to increase the fecundity of our ani- mals. Twin-born fe- males from species nor- mally producing one young at a birth will tend to reproduce this quality in their off- spring. An exception to this is to be noted in the case of twins born to a cow in which one is a bull and the other a heifer. In such cases the heifer is usually sterile and is called a "free ; [See page 24.] It not infrequently happens that some particular female fails to become pregnant to a certain male, but will readily conceive to another male. This is called incompatibility. There are numerous remarkable cases of fecundity on record which tend to show the possibilitiesof increase in our domestic ani- mals. A Clydesdale mare belonging to G. W. Henry, of Iowa, gave birth to 19 foals. "The Rural New- Yorker" pictures a cow 22 years old -that has had 20 calves and was again pregnant. " The Country Gentleman" describes a Leicester ewe as giving birth to 6 lambs. The same paper describes a sow of ordinary breed that produced 23 pigs in 1 litter and 85 pigs in 5 litters. Barrenness.— Bar- ren animals are not uncommon, but this failure to breed may be due to a variety of causes. The non - de- velopment of the ova, presenlat/on. tumors of the ovary, Croup andhock det/iat/bn. or fatty degeneration Fig_ 33. Abnormal presenta~ of the ovaries or Fal- tions 0f f0aj. Posterior- • presentation f?it]hthind-/eqbe/ztoa itselp. /Inferior . presentation Fore-limbs bent on Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bailey, L. H. (Liber
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