Update - mix of good and bad, Little link has went down hill, so his heart is better the antibiotics helped him... However.... But yesterday I noticed his poop was a little off, it was not the right shape Bit dry yet a little runny, eating drinking fine though, so I was a little concerned called my vet, she said just keep an eye on him mush up the pellets in water maybe he is not being use to eating them are upsetting him. Keep a close eye on him, (we had an appointment for Friday so it was concern but eating, drinking fine...) this morning full on diarrhea like running down my arm blob at his rear. Immediate or the phone to the vet, We have stopped all antibiotics, The vet is giving him a couple of days to hopefully turn it around naturally as she thinks it could be the antibiotics as he was all signs of imprisonment all positives... But today when I got up to go through the morning routine I pick him up and it's running down my arm and his tummy is swollen. I call Links Vet immediately! I'm no guinea pig whisperer but I'm pretty sure diarrea is not good. And of course she says to bring him in, I'm like I will have to call you back as I don't have a car and my partner is at work so let me get hold of him or a mate. So thankfully his work let him get out for a few hours.
He is eating and drinking fine still very active. And his weight has been improving and no has no signs of the infection. She could hear his little heart beat normal (while before she could not) So our vet thinks that maybe it's the antibiotics have worked and ran the course and due to this they are not required and they a stuffing up his guts, so if taking him off the meds does not allow his body to naturally fix it-self he will be going back in in two days, for more intensive care. As he is eating and drinking all on his own. No need for critical care or syringe feeding (like he was in the start) and he has even been eating pellets all on his own so all improvements the only difference what is poop. So this is why she thinks/hopes it's just the antibiotics give him a few days off them an see if that corrects it self, if not it is something more serious and he will be going under more intensive care. Poor little guy.
I also checked out the other two, just incase it's some type of virus, they appear fine. And the fungal is clearly up so well, but We also took in the other two just to be safe in case it was some type of virus. She was so wonderful she didn't even charge us for the vist. Also she gave us some critical care (as its apparently impossible to find) just invade.
So have Link in your prayers.