bone loss question

I was watching a documentary on the Discovery Channel which covered people who were hermaphrodites and were surgically altered to be one gender rather than having both. Most who had the gonads removed suffered bone loss. I’ve also read about eunuchs experiencing bone loss after their… choice at some sites while surfing the web.
Do dogs experience bone loss when they’re neutered or spayed? Is bone loss from loss of gonads simply a human thing?

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