Diet No clue why she's SOOO SKINNY !!!!!

Kaytee's Fiesta Blend isn't very good. Which country do you live in? We can recommend other pellets.

She doesn't need a mineral block -- please take it out.

What vegetables are you feeding her? And how many pellets per day does she get? How much hay do they get, and where do you get their hay?

How old is Daisy? (I ask that because younger guinea pigs have different nutritional needs than older ones, and you may have to make some adjustments to accommodate both.)

I'm in the US in Ohio. Mineral block gone no problem. Until now I haven't been giving anything other than the pellet food and hay. I'm still learning and just read that people feed veggies but didn't know if it was more of a treat thing or a requirement so I've been researching that and what veggies are best. But she has a constant supply of pellets and the hay comes in a bag from the pet store. It's also Kaytee Timothy hay with marigolds which she also has a constant supply of.
But sadly Daisy suddenly passed away about 2 weeks ago. She was active and eating normally the day she passed. She went to sleep and never woke up. So at this point it just Cindy Lou by herself but I'm hoping to find her a friend that is similar in age.

Have you tried popping a stuffed toy or even a stuffed sock so she will feel like there's still company to cuddle up 2?
Any clue what might have happened to your older girl? Did you quarantine the new one before you added her?
Sorry for all the questions! I kept thinking of them while I was typing xx

Also do you weigh your guinea pigs? A rapid loss in weight is a sure sign that something is def wrong. Most people do it about twice a week some less some more.

I thought of putting a small stuffed toy but thought that she wold know the difference and was also afraid that if she chewed it she might swallow the fabric or stuffing.

No idea about the older girl. My 21 yr old son brought her home one day about 6 months ago because she was a gift from his girlfriend. We just assumed she was much older because she was twice the size of Cindy Lou. We kept them apart for about a week and then introduced them. This was back in Dec. Daisy was eating and drinking normally and hadn't lost any weight. She just curled up to go to sleep and never woke up. I just assumes that since everything was normal with her that she must have been older than we thought because like I said no weight loss or change in habits and no change in her stool.

I will say the only thing that was recently new besides a bigger cage was the bedding. I bought the same kind as before which was the fluffy paper type bedding but instead of the plain gray looking stuff I bought the colored stiff. Could the dye in the bedding be the issue ? Also the brand of food I got was different. She was eating Hartz but I bought Kaytee which another poster said wasn't a good brand.

I had a pig who was skin and bones,have you tried putting a bowl of wet pellets with her regular pellets? And try ordering critical care for her, personally my Chloe hated if with water, we used a type of juice( i think cranberry juice?.. ill check into that) It was sugar free. And I would start weighing her and keeping track of her weight. As @Rach84 said try adding a stuffed animal or something stuffed so she feels like shes not alone. And with veggies take it slow with her.

Oxbow Cavy Performance Pellets are much more suitable for a young guinea pig than the Kaytee Fiesta.

Although it will require more money up front, you can order hay online much cheaper than you can buy it by the small bag in a pet store or at Walmart, and it will be much, much fresher. Don't be put off by the shipping costs -- figure out what you're paying per pound and the local store, and then what the cost per pound (hay + shipping) would be. (broken link removed), (broken link removed), (broken link removed) and Oxbow all have bulk hay -- you get the first three directly from the farm, and the Oxbow by special order at a pet or feed store near you.

The cheapest way to find hay is from a local farmer -- a bale should be less than $10, and even if you wind up throwing most of it away because you don't have room to store it, it's still cheaper than a local store. Any kind of long strand grass hay is good -- timothy, blue, orchard, meadow, brome. Avoid alfalfa because it's not a grass hay -- it's a legume, like peas.

She needs up to a cup of veggies at this age, and about a cup or a little more when she's an adult. Staples in her diet should be lettuce (red or green leaf is good) and bell peppers. She particularly needs the peppers for vitamin C. See https://www.guineapigcages.com/foru...y-nutrition-charts-poisonous-plants-list.html for what you can feed and how often.

I agree that a stuffed toy would be good, but she may not pay any attention to it. She needs a friend as soon as you can find one.

Any particular type of hay better than another? I notice on the one site they has 3rd cutting and 4 th etc what's better ?

Hay gets from 2-4 cuttings a year, depending on how long the growing season is. Almost all hay fields can be cut twice, some three times or more. Usually, the later the cutting, the softer the hay. I've never heard of a fourth cutting unless it's really way down south, and in my experience, that's usually pretty crappy hay.

I usually feed mine a mixture of second and third cut. I figure second cut is probably better for their teeth because it's harder, but they LOVE third cut. So I mix it.

I have one fairly thin guinea pig, but she's definitely not what I'd call skin and bones. She's just lean even though she eats a lot. I assume it's just because she's very active. Her cage mate (the one closer to her in age) is extremely rotund and is far less active. The fact that you describe her as skin and bones is concerning. Does she get a lot of fruit or sweet veggies? I'd consider a vet visit may be in order to check her for diabetes. I'm not sure what the other possibilities could be. Best wishes and healthy piggy vibes!