I have a German Shepherd dog whose name is Alex. He is a male dog and he is approaching 2 years of age in this November and have not desexed him. The dog has never been mated with another dog. Now, Alex has been quite okay till now.
My brother warned me that dogs can have disruptive outbursts, at times, as they grow into adulthood. Causing them to bark, not pay attention to your instructions and even bite you. Often, I observed, he does not listen to me and plays obstinate. But he fears me if I intimidate him.
So is there any reality behind my brother's claim and that's why he is acting strange sometimes? Or I have been affected by his advice deeply? Is there a connection between this behaviour and whether or not our dog mates with other dogs?