Because by then they should be hormonally mature even if not fully structurally mature. I don't read much research - I follow experience !
Ideally, not at all, but if they MUST be spayed, then let them grow up first.
I've Got A Grinder
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With all the wierd sounds our B makes he now has a new one. His puppy teeth are falling out and new ones are growing in. Early one morning I heard him grinding his teeth. He doesn't seem to be in any pain. I checked his gums and everything looks to be fine.
Now with the old man denture sucking sound he makes I now get some grinding. Music to our ears :rolleyes: -
Sometimes there's a loose baby tooth in there rattling around and he may be trying to get rid of it.