Spaying/Neutering your puppy too early DOES indeed negatively affect the dog physically & mentally... (you're literally stopping hormone production that is
responsible for brain development, bone/ligament/muscle development, etc.)
![](https://files.cdn-files-a.com/uploads/3694698/2000_64d3f20344fa2.jpg)
I don't care what your local shelter/ rescue or even your veterinarian has told you...
((this has been scientifically proven--- do your own research! -- especially before you bring home that 8-12 week old puppy from the shelter/rescue//etc))
Remember this before you want to remove crucial hormones that the animals require to grow properly...
![](https://files.cdn-files-a.com/uploads/3694698/2000_64d3f20d6ce97.jpg)
It is highly recommended to wait until TWO years of age to spay/neuter (unless it's considered medically necessary -to be life saving only- ie: pyometria, prolapse, etc. ))
More info here and here