My guinea pig has a cold. Is there anything else I can do?

I can see you take the care of your guinea pig very seriously, but you need to do one more thing, which is to take her to the vet. The likelihood is that she has an upper respiratory tract infection which needs antibiotic treatment. Your vet is likely to prescribe baytril or septrin to treat the infection, and might also give you a prebiotic & probiotic combination such as Bio Lapis or Fibreplex in order to repopulate the gut with good bacteria (the antibiotic can't tell the difference between good and bad bacteria). Don't give the prebiotic & probiotic at the same time as the antibiotic, leave at least half an hour between each otherwise they will have a tendency to cancel each other out. If she is having fresh air, make sure she isn't in a draught. Don't encourage too much exercise as it can put a strain on the immune system which is already trying to fight off the infection. get well soon, little piggy!