Thanks for all the tips. I'm afraid one of the kittens has taken a turn for the worse. My friend has been back to the vet and this is the latest (I'll post it below) but she was wondering if she can do anything else as she is very worried about him:
I took both kittens back to the vet's this afternoon. The vet did express concern that white kitty has taken a turn for the worse but he did say that it's not time to panic, since these things in kittens are quite common when they come from shelters.
He reminded me that this virus usually takes 10 to 15 days to run it's complete cycle and it has now only been 8 days since he saw the kittens last. He put both kittens on another stronger antibiotic called Clindacure and also a gel for herpes virus called Viralys L-Lysine as a preventative measurer. He also wants the Gentamicin eye drops to be continued but to also put one drop in each nostril as well.
The vet said that I should also put in kitten in the bathroom with me when I take a shower so the steam from the shower would help loosen up the congestion and to continue using a warm soft cloth to keep kitty's nose clean. He said use a Qtip if necessary so that kitty can breath better.
They both have gained good weight, so that is one reason the vet said it is not time to panic.
Here are their weights 8 days ago and todays:
White kitty weight: before 2.4 lbs - today 3.1 lbs
Gray kitty weight: before 2.2 lbs - today 2.9 lbs
Since they were underweight before I feed them three times a day moist food and unlimited dry food