Gus is about 6 months old. We've had him since he was about 9 weeks. We got him neutered about 2 weeks ago. Since then, he's been really aggressive. Before, when we played with him, he would never really bite or scratch. He would back off, but now he's biting and scratching with a lot more force and does it repeatedly. We tell him "no biting" but he doesn't listen anymore. We used to be able to take him off the kitchen table and say "down" and he would go down, but now he won't and he more consistently tries to get on top of the table. Has anyone else experienced a more aggressive change in behavior after neutering? Could neutering do this, or could this be because heâ€™s getting older?