The vet can do a post mortem but it will be expensive. So sad as she wasn't that old. There's just no telling how long they will live for. Take comfort she had a quick end and was at home with her friend. You loved and cared for her so she had a happy life.
Her friend will think she is the only guinea pig in the world and may become withdrawn over the next week, you'll know if she sits quietly staring at the wall. Ring round the rescues to see who they have and arrange a guinea pig bonding playdate.
Sorry to hear about your poor piggy . It's often very sudden as they hide symptoms well, but that makes it a huge shock for you. Your remaining pig probably knew what was going on with her friend and it's good that they were together. She'll feel a bit lost and probably need lots of extra attention and cuddles. When my Scruffypig was bereaved I gave him some rolled up socks to snuggle up to when he couldn't be with me. Apart from that he was a lap pig until he could collect Gingerpig (then he perked up dramatically). He was on his own for nearly 4 weeks and it must have felt like years to Scruffy. He did seem withdrawn and quiet.
I'd phone a few rescues and see if you can find a companion ASAP. Some have neutered boars desperate for homes. Then go on some piggy speed dates to see if any prospective partners are up to scratch
I am so sorry to hear of your loss. It is always heartbreaking. Echo what others have said, try to find a friend for your remaining girl. Our Mollie really did pine when we lost her companion but rallied immediately we found Sadie for her. Mollie stopped speaking and looked utterly depressed when alone. We spent lots of time with her, talking and cuddling her and we gave her a knitted doll thing to sleep with. It is good they were together, I am sure they know when their friend us I'll and sadly dies.
TBH, a Post Mortem might or might not throw some light, I personally wouldn't have one done. It's very unlikely there's anything contagious, possiblity something familial (your piggies are sisters IIRC)?
Keep her close by, let her have some quiet time to grieve. And YY Piggie dating, there are lots of single pigs out there.
It is so sad when they go but you console yourself with the knowledge that they had a good life and were cherished. What more can these greedy little cuddly rodents wish for?
Our GP1 and GP3 were on their ownsomes for 6 days before we matched them, waiting for the right piggie. At night they slept in DD room but I did feel sorry for them in the day in the Pighouse alone, but, it was their familiar territory.
Thank you all for your kind wishes. They've made me cry again!
I will be making dates over the weekend. This is the first day I haven't heard a sound out of our cage daisy is just sat in the corner. We've had her out for cuddles earlier but when kiddies are in bed she'l be coming out again
They look so sad don't they? Just loads of snuggles, favourite veggies and boxes/paper bags to chew and hide in. Just things to keep them alert and interested. Leave a radio on when you're not around and just chat to her when you are.
Scruffy watched so much TV when he was an only pig, he's a bit of an addict now and will shove arms out of the way to get a better view of a screen.
FernieB Love the idea of Scruffy the telephone addict.
Lulu used to live cricket especially when we were beating the Aussies. She'd get very excited and run along the back of the sofa. Sadie loves Geoff Stelling on Sky football on Saturday afternoons, along with the Scottish silver fox who used to play for Arsenal. She snuggles down with DH and grumbles loudly when moved
I had a previous bun who loved cookery programmes and would settle down in front of the TV whenever she saw food. She especially loved Masterchef and did huge binkies when it started. She never even hid her eyes when they cooked rabbit.
((((HUGS))) to you and your remaining piggie from me and my piggies. it is never easy to lose a furry friend. IME guinea pigs sometimes need a few days processing their grief before they can handle a new cagemate but it does vary. wheee wish you and her all the best