My Guinea Pigs Aggressive Behavior

[Redys]

I have a guinea pig named Lucifer who I think is albino I'm not sure (all white with pink eyes, no color anywhere). He's bonded to another guinea pig (named Rebel) that I got with him from a friends friend that couldn't keep him, point is he can't be with my other guinea pig because he jumps on him, bites him, nips at him, chatters, chases him, attacks him, shoves him away from food and water, ect. so I had to put a median in my "Open Living Cage" (I think a 40x24 ?). This means Lucifer and Rebel are always together which wasn't a problem but now he's been chasing him around, harassing him and almost jumping on him, putting his front paws on his face or back as if trying to mate with him. I'm worried that Rebel might be female or something is off with Lucifer because I've had them both about 5-6 months now and this just started. What should I do?

 

[Piggies&buns]

First, there are no albino guinea pigs. He is a pink eyed white.

You must check their sexes for yourself.

https://www.theguineapigforum.co.uk/threads/illustrated-sexing-guide-for-all-ages.156297/

Two boars who get on and can be together need a large cage and if the measurement you have provided is the cage they are living in, then it is too small and below welfare standards for two sows and as boars need more room than sows, then the cage is definitely too small for two boars. However, If their bond is dysfunctional and bullying is going on, then it isn’t relevant now as they cannot continue to live in the same cage.

Dominance including chasing and mounting is normal between two piggies of the same sex but if it goes beyond dominance and into aggression and fighting, then the piggies do not like each other and they must not continue to live together. Two incompatible piggies cannot for a bond and form a hierarchy Which is why you take a risk if you take on a new piggy on spec.

If he is being chased away from food then that sounds like bullying which again, is another reason why they can’t live together.
How have their weights been? If one is losing weight through not being allowed to eat then that is a sure sign of a dysfunctional bond.

If they cannot live in the same cage due to not liking each other, then each piggy will need to live in a separate but side by side cage so they can interact through the bars but not have contact with each other. Each piggy must have a cage measuring 120x60cm (48 by 24 inches each).

Bonds In Trouble
A Comprehensive Guide to Guinea Pig Boars
Boars: Teenage, Bullying, Fighting, Fall-outs And What Next?
Dominance Behaviours In Guinea Pigs

EDIT - here you mention a white piggy, but on your other thread you mention a tan with a bit of white and a long haired black/orange piggy.
Can you please clarify how many piggies you have and how many are living together ?

If you are attempting to keep three boys together, then that will explain aggression - boars can only be kept in pairs. Three boars together will fight and adding a third boar to a pair can also destroy the relationship of the original pair

If you’ve got a sow in with them then that will also cause huge problems not to mention the pregnancy risk.

Please let us know how many piggies you have living together, what their sexes are. You must separate them if you’ve got a sow, or if you’ve got three boys together.