My 6 month old cavy shows sign of aggression. I got her when she was a month and a half old and she is the most vocal piggie I have ever heard and her personality is as loud as she is. Whenever I touch food that is near her she is quick to lash out and challenge and bite me. She bites me whenever my hand or fingers even look like they aren’t going to pet her only on the top of her body/head; but she is comfortable around me as she climbs on me, crawls over my arms and legs, accepts food straight from my hand, and even cleans herself on me. Despite that being said, I still feel like she is very defensive and you can tell by her body language that when my hand is next to her or her face she is very uncomfortable and will even lash out and bite it without being touched even without any sudden movements. Immediately after the signs of aggression she goes back to lowering her body and head on me as if she’s comfortable and wanting to be pet. Her aggression is very temporary as she doesn’t really try to hide or run away from me but instead just lashes out very aggressively, then calms down again and acts like nothing happened.
Hi!
Please take the time to read these guides here and follow the piggy whispering advice to establish a group hierarchy with you as leader in which you can then tell her what is OK behaviour and what not in ways she instinctively understands and accepts. This method is suprisingly effective because right now - as far as she is concerned - she is living away from her a hierarchical group in a power vacuum.
" Biting" And What You Can Do
Understanding Prey Animal Instincts, Guinea Pig Whispering And Cuddling Tips
How To Pick Up And Weigh Your Guinea Pig
You are also dealing with a teenager right now at the time when her teenage hormone spikes are strongest. Sows rarely fight, so this aspect is often overlooked as not all sows experience this equally strongly; but this is the often the time when the drama when they are in season is the greatest. It is no accident that the teenager in the videos is 6 months old when took them! Because your girl is a single, you are unfortunately the recipient of all those extra energy and stress.
Sow Behaviour
When Sows Experience A Strong Season (videos)
If you want to find your sow a friend, the best way is by dating her at a good non-kill rescue with mandatory quarantine, vet care and pregnancy watch for incoming sows in contact with a boar, so your girl can have a say at who she likes and gets on with, and you come home with a new mate only if there has been success. Character compatibility and mutual liking is much more important for a successful bond than age. With rescue piggies you can also look at both sows or neutered boars, as long as you can date. Since there is no licensing or supervision for rescues, you will have to do your research, as anybody can call themselves a rescue, and the results can be accordingly.

Our recommended rescues will also double-check the gender before they will let her meet a rescue piggy.
We have got lists for recommended rescues
UK:
Recommended Guinea Pig Rescues
Some other countries:
Guinea Lynx :: Rescue Organizations
If you want to get a same sex companion yourself, you may need to take these considerations into account:
- ALWAYS double-check the sex of both piggies before they meet!
Sexing Guide
- Quarantine if you get a piggy from a shop/for sale breeder/shelter without medical care or substandard rescue.
What to check and look out for in new guinea pigs (vet checks, sexing, parasites&illness)
Importance Of Quarantine
- Take to the read and follow our bonding tips beforehand.
Bonding: Illustrated Dominance Behaviours And Dynamics
- Have a plan B in case a bonding is not working out with a piggy you have bought on spec.
Many of these links are part of our New Owner's information collection. You may find it both interesting and helpful as we are addressing all the areas we get the most questions and concerns about. You can access the collection via this link here:
Getting Started - New Owners' Most Helpful Guides