Conditions 3 year female died randomly. why :(

Are these your first guinea pigs? Newer owners often miss the subtle symptoms that let you know they're ill. Loss of appetite, change in behavior, excessive drinking, dropping food out of their mouths when they eat, runny eyes or noses, labored breathing, hunching up when they pee, sleeping a lot are all symptoms. It could even be something like a congenital heart defect where there wouldn't be any symptoms. The only way to know for sure is to have a necropsy done to find a cause of death. If her companion has never had a well check, you could make an appt to have her checked out. A heart murmur or URI would be detected. I doubt it's from the males. You'd have seen symptoms if she caught something from them. Once you rule out illness, you can get her another companion. Your local guinea pig rescue can probably help you find a suitable friend for her.

Yeah they are. I try to watch very carefully. She seemed to be doing everything normal.
I was thinking heart problem. I don't know why. Just was.
I have an appt for the boys. I'll have to add the girl to it.
Thank you.

I am so sorry for your loss! It is a terrible feeling. I agree with Pinky. Vets have told me that piggies go down so fast, they are great at keeping their illness hidden from us! I once noticed my 8week old girl wasn't right and rushed her to the vet. They had her in an incubator and were even doing CPR, on a tiny piggy!! Turns out it was a congenital problem.

Sometimes as hard as we try things do go wrong so all you can do is find her a friend and give them all love as usual . All the best! x.