Oh boy there are So many out there...for dogs (and for humans) but I found this very helpful in explaining a few common old breeding myths; Hope you Enjoy!
This is out of the book "Breeding Better Dogs." By Carmelo L. Battaglia, Ph.D.
"1. To begin with, one must realize that a dog cannot pass on to its offspring traits that it has acquired through obedience training, gentle handling or special diets. 2. Telegony-the theory that the sire of the one litter can influence the progeny of future litters coming from the same brood bitch-is a false theory. 3. The notion of saturation is one that falsely presumes that a bitch if bred to the same sire several times becomes "saturated" with his "blood line," so much so that her puppies will be only of his type, even when mated to another stud. 4. Blood lines, pureblood, and blueblood are old outdated terms which mislead people. For example, have you ever heard the statement, "I am proud that the blood of Daniel Webster runs in my veins." Think about that, a remarkable feat, nothing short of a miracle because this would requre a transfusion from a corpse who is long time dead. 5. The breeding of two dogs that represent extremes will result in puppies that represent the average. That is, that many believe that breeding an extremely large dog to a small dog will yield the average of the two sizes. (Note: In the F1 generation it frequently occurs, but not there after.) 6. Inbreeding produces degenerate offspring. This misconception exists because sometimes inbreeding produces puppies which concentrate the weaknesses and the faults of the two parents. 7. Females if well nourished during pregnancy tend to produce a preponderance of females, and poorly nourished bitches tend to produce a prepoderance of male puppies. There is no evidence to support this myth. 8. The law of ancestral inheritance means that the progeny derive 50% of their heritage from the immediate parents (or 25% from each parent; 25% from their grandparents; 12 1/2% from the great grandparents and so on). This no longer holds true. 9. Bitches with long loins are more desirable than those with short loins because there is more room for puppies. Consequently breeders in the recent past believed that long loins meant larger litters, which has no basis in fact. 10. Puppies at birth can be accurately evaluated because their true structure is in miniature form. This is more fiction than fact. 11. Bitches when in heat that have been bred to one male will not allow another male to breed to them. This is obviously not true. 12. If a bitch was bred by two or more males, each puppy may have more than one father. The truth is that each puppy will have only one sire. Puppies from this kind of litter will be known as half brothers and sisters having the same mother but different father. The question is which sire is the father." [ image disabled ]
hahahaha! I know that in chihuahuas they want a longer loin and bigger females so the get more pups. I heard that about all toy breeds. They just have BIG pups.
and #7...lol Cena was a fat well Nourished pig when she had her litter of 16 and had 10 males and 6 females.
Isn't funny what some people believe? I was once told by a concerned bystander that I should be very careful, because my cats and ferrets would "interbreed."