Quote Originally Posted by phesina View Post
Take him to see the vet. I'd say at 6 months he's ready to be neutered, but be sure and tell the vet about the behavior changes. There might be something else going on with him physically that needs attention.

What a fantastic job you have done saving this guy and treating him for ringworm! Good, good!
I concur. The tipoff to me is when you said that originally he'd whine when you picked him up. Something may be hurting him and may have become more painful to the point where now he's aggressive. He's old enough to be neutered, too, so I'd definitely get that done.

What an adorable little fuzz nugget he is! You've certainly given him lots of TLC and gotten him back on the right track. Good job!