I've had my gliders for two years. In that time Diva has been the dominate of the pair. Diva would go right up to Teddybear and take her treat or food. Teddy did not seem to care until a few weeks ago. I started noticing fighting noises at night. I noticed that now Teddy fights or at least runs away and won't give up her treat/food to Diva.

I've been checking them both. Although Diva is bigger and tougher, I have not found a wound on either of them. They are half sisters born within days of each other. Always been in the same cage.

Do you think things are ok?

Hi!
Two quick thoughts:
Are you putting an abundance of food in two separate locations? If you have two feeding stations and there's some food left over in the morning, that may decrease any bickering over food because neither glider will feel like they will run out and both can eat in separate, "safe" feeling locations at the same time,
Second, if that doesn't help maybe a checkup is in order?

Yes, my quad bickers a little here and there and they seem to be fine, but still keep an eye on them and check them each morning. Oh, and make sure there's two pouches in case they want time apart, and if they sleep apart a night or two it should be ok as long as they end up back together within a day or two. My gliders do that, too.