Dr Chris Zinc is the professor of animal sports science at Boston U and has done major research on the effects of de sexing a dog before the growth plates have fully matured. She established a direct link to increased risks of ACL failures in dogs that had been desexed too early.
She was able to prove the theories you stated in the last post. I am pretty certain either I have, or someone else has posted one of Chris's papers in this forum.
Age to do the deed depends on the size of the dog. SMall dogs around 6 to 9 months. Mid size dogs from 12 to 18 months. For large dogs from 18 to 24 months.
If you are a registered breeder with a breeding licence and your sole intention is to breed to improve the lines of your breed then you spay a bitch after her 2nd or 3rd litter.
If, on the other hand, you are not a registered breeder, then the reason you spay is to (a) avoid accidental pregnancies with fido from next door, along with the associated costs of raising, feeding, micro chipping and vaccinating a litter of pups; (b) to avoid having Fido and all his male friends peeing on your front door and trying to break into your back yard, digging up your prize roses in the process; and (c)to avoid the problem of your sweet little angle leaving her vaginal calling cards all over the house.
It is a falicy, total BS, that a bitch should have one litter so that she is happy/complete/fullfilled - whatever.
As for the boys, if a dog, any dog for that matter, has not been properly socialised, then it may show signs of aggression to other dogs. Cutting off the nuts will not stop that aggression because it is a learned behaviour. Similarly, if a whole male is a wanderer, cutting them off will not stop the wander lust once he has discovered the joys of freedom. It is ALL in the training and socialising.
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