I explained in my last post about the unusual recent aggressive behavior of my 1 1/2 yr old male. He had been raised alone as I thought I could find him a friend sooner but I was able to find a female a couple months ago. Ever since his demeanor has changed drastically towards me. The female is as sweet as pie, just like he used to always be before I got her. He will play on me, jump off and climb back up to jump again, eat out of my hands, let me pet him like usual, but after a while (could be 20 min-1 hr) he would "switch" to a mean, aggressive, completely different glider than he had ever been before. His posture is that of an attack and the white part of his eyes begins to show. He will lunge at my hands and face, and will bite and not let go. He draws blood mostly every time and causes scabs for a week. I am not doing anything different with him so I don't know what to do. I usually just call him after this so he jumps to my arm then I put him in his cage. If I talk to him softly while he's in the cage and upset, he lunges and tries to bite. What is going on with him? He's been neutered for a few weeks now but still the bad behavior continues and it is just so random- will happen while alone so it is not the female or anything. Please offer any advice!!! He is frightening me and is so different than he ever was before. :(

Is he neutered??

Yes he is neutered! It says in the post!!
I wish I could help. I know there are some smart people on here that can solve your problem though!!

Hang in there, someone here will surely be able to offer some good advice! I have no experience with this sort of thing so I'm hoping you will get assistance soon!

Edit: I did a little reading and have two thoughts... 1) your female could be in heat. Lots of male gliders still behave like they are intact, all the way to actually breeding with the female, so his nose could be telling him to "get to it". 2) he is around the age where some gliders go through a grumpy, "terrible twos" if you will. Considering those possibilities I would suggest treating him the same you would a new glider that bites. Don't reinforce the biting behavior by putting him away or by screaming and pulling back. Get him in his pouch if possible and hold him comfortably against you, NOT SQUEEZING, until he settles down and preferably falls asleep. Try this for awhile and see how he responds. Also, if he is crabby when you go to take them out, just leave him alone. Maybe he needs a little alone time.

I know it's not my female in heat because he's been like this every day for the past month or so...and I have read to not act afraid, but since he's attacked my face it's been hard to not be afraid. He went for my eyes once but fortunately I wear glasses. But I am afraid when he switches to being aggressive and on the attack because he chews on my skin like it's food or worse and doesn't stop even when I don't move and talk to him calmly. I can't take it for longer than about 10 sec. though because he is really tearing into me and it hurts a lot. I will try to put him in his pouch after he bites and see if that works.
If anyone can try to explain what's happening with him and what I can do I'd really appreciate it as I can take all the help I can get!

I just did a little more reading... Has he been to the vet since he started doing this behavior? If not you should schedule an exam as soon as possible. Since gliders are so good at hiding illness this might be the only symptom of something physically wrong you will witness until he is very, very ill. Good luck!

strange thought, but have you changed body wash or shampoo lately? maybe you don't smell like you should to him. maybe even laundry detergent.

he also may just be possessive of his new love and will settle down after his hormones calm down after the neuter

I have got a male that has very simply decided I am food. He does not start in grooming then gnawing, he just starts to rip off a chunk. He does not act agressive at all, just calmly (calm for a glider) starts feeding. I have tried a few ways to discourage him. I have finaly started thumping his head gently. Not hard enough to scramble his brains, just a light forefinger thud about as hard as if he just made a poor landing. He does not seem distressed by this, just distracted. He still chews on me, I have not won this battle, but I think it's gonna work.

As i mentioned, i do have a hand reared male who developed the same behaviour after being such a sweet joey, he is much more "masculine" than my other full males, he constantly scent marks and bites at everything. unfortunately I think its just his nature to dominate, he also bit my face which took a long time to heal and i did worry he might get my eye too, sorry, i don't have any answers other than dominate him more (although it might become a battle of will!) and wear gloves + protection when around him.

Hmm. So it sounds like he's not the only biter around. I hope my Giz isn't one of those dominant alpha males, but I guess he could be. He is only like this to me now but when he started he tried it with my boyfriend a couple times too. He quickly learned to stop when my boyfriend held him tight in a position that he couldn't bite him in until he stopped trying to fight. Since those couple times Giz hasn't bitten him, but he does play with him less I think. And I've read to not use negative reinforcement... I don't know if restraining him is punishment or if it will teach him that he won't get anywhere by biting? Can anyone tell me if restraining him until he stops fighting is bad for our relationship? Or does this assert to him my control over his bad behavior?