If you think that the humping is sexually motivated then that would be a little early, indeed. However, humping can be triggered by several things and goes far beyond being just a sexual behavior. It could also be a dominance behavior and the puppy trying to establish a leading role in your household. I personally have never stopped Djamila when she was humping toys, which she does now and then. But if she would attempt to do it on humans or other animals - which so far never happened - I WOULD stop her.
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However, humping can be triggered by several things and goes far beyond being just a sexual behavior.
It could also be a dominance behavior and the puppy trying to establish a leading role in your household.
I personally have never stopped Djamila when she was humping toys, which she does now and then. But if she would attempt to do it on humans or other animals - which so far never happened - I WOULD stop her.