Henry Scott says: "Dog-breeders know this theory well; and if a pure-bred bitch happens to breed to a dog of another breed, she is of little use for breeding pure-bred puppies afterward.

Animals which produce large litters and go a short time pregnant show this throwing back to previous sires far more distinctly than others--I fancy dogs and pigs most of all, and probably horses least.

The influence of previous sires may be carried into the second generation or further, as I have a cat now which appears to be half Persian (long hair).

His dam has very long hair and every appearance of being a half Persian, whereas neither have really any Persian blood, as far as I know, but the grand-dam (a very smooth-haired cat) had several litters by a half-Persian tom-cat, and all her produce since have showed the influence retained.

The Persian tom-cat died many years ago, and was the only one in the district, so, although I cannot be absolutely positive, still I think this case is really as stated." Breeders of Bedlington terriers wish to breed dogs with as powerful jaws as possible.