Hello and thanks for researching this very important question!

Young hamsters are weaned by their mothers by 4 weeks of age. They quickly become sexually mature after this.

"Reflexive biting" is the term used when animals become too crowded in a small space and are forced to compete for food and bedding.

You should separate this litter into males and females to prevent further aggression and competition, and so that you do not become a Hamster Factory!

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I would only use some hydrogen peroxide (mixed half-and-half with water to prevent stinging) on a Q-tip 2-3 times daily. If this does not seal the wound, you might want to have a veterinarian look at it in case infection has set in.

Super Glue contains chemicals that would be toxic to any animal.

If the wound is minor, and not deep, it can close on its own as long as his bedding is kept clean and fresh.

A deep and actively bleeding wound should be examined so that the proper antibiotics can be prescribed for oral use (hamsters wash off anything you put on the skin!).

I really wouldn't use any glue that is not labeled for use on skin! There are some People Skin Glues available at pharmacies, but again, hamsters will groom off anything that is applied.

Cauterizing this wound a couple times a day with some hydrogen peroxide is my personal preference.