Guinea pig back area bigger than it's body

[Beef]

I've had my guinea pigs for about 2 months and I've noticed that my American breed (jelly) back area is bigger than the rest of her body. It does not seem to discomfort her and it does not feel hard. Should I worry?

P.S
I've noticed this from the day I got her. She is almost 2 years old.

 

[RedLoredAmazon]

Hi! Has your piggy been checked by a vet for this before? Can you post a picture? I'm having trouble picturing this, although it might be because I didn't get much sleep last night!

Is it a lump? Sorry for so many questions!

 

[Piggies&buns]

It’s not clear what you mean by this.
As above, you can post a picture to give us a better understanding, but you will need to see a vet for any concerns

 

[WobblyPiggy]

Hi,

Do you mean she looks a little bit like a pear shape? (I know that sounds awful) if so it could be worth a trip to the vets just to rule out any medical issues...since piggies are notorious for hiding their pain and discomfort...if there are no medical issues present it could be just that she carries her weight differently...my female piggy always looked a bit like a little fluffy pear...in the cutest way possible...but she is a good weight for a piggy and was never uncomfy (before her medical issues)...whereas my two boys who are quite a bit heavier never looked like that...the only other thing to do is to keep an eye on her weight as that can factor in...and if it fluctuates it could be that she is just filling her belly up with delicious food so he belly will expand to compensate...

 

[Wiebke]

I've had my guinea pigs for about 2 months and I've noticed that my American breed (jelly) back area is bigger than the rest of her body. It does not seem to discomfort her and it does not feel hard. Should I worry?

P.S
I've noticed this from the day I got her. She is almost 2 years old.

Hi

Especially adult sows but also some boars have a naturally pear-shaped figure; the shape of which can be breed specific. A picture may help. Any sudden or even gradual changes (bloating in all genders or in sows a potential pregnancy and especially older ones, large ovarian cysts) should be vet checked.
It would help if you could please tell us whether you have got sows or boars and if you please took a picture from above and uploaded it into your post by using the Attach Files button below your post. We cannot answer your question properly sight unseen.
What breed are my guinea pigs? Picture guide to common pet breeds

Please make sure that your piggies are a good weight for their individual size (cavy BMI of heft); just the weight on the scales doesn't say whether your piggy is overweight or not for its individual size, which can actually vary much more than expected. You never do this around the bum because the wide natural variance in shape but you feel around the ribcage. Ideally, you should just be able to feel the ribs. If every rib is standing out, your piggy is underweight and if you can't feel the ribs at all, your piggies are overweight. Overweight piggies also tend to have a more pronounced bum.
This examination for the 'heft' or BMI gives you the ball park your piggies are playing in and which help you to put the weights they are bringing on your kitchen scales during their life-long weekly health monitoring weigh-in and body check into the correct perspective.
You can find all the necessary tips and information for important health monitoring in these links below:
Weight - Monitoring and Management
Guinea pig body quirks - What is normal and what not?
Boar Care: Bits, Bums & Baths
Early Signs Of Illness

You can find lots more helpful and practical tips and information on a wide range of topics in our New Owners guide collection, which you may want to bookmark, browse, read and re-read at need: Getting Started - New Owners' Most Helpful Guides