You can change water, if the fish mean anything, it won't delay the cycle much, as any decent levels of bacteria live on objects.
IMO get the ammonia and nitrites down, fast, with water changes, and keep them low.
The fuzzy eyes you see is ammonia burn, and aslong as you can keep the water in better condition they could survive.
Your best bet would be to re-home the fish in a cycled tank and do a fishless cycle with pure ammonia. That way you can care for the sick fish and get the tank cycled ASAP, without being cruel to some cheap fish.
Here's a read on cycling and how to do it fishless.
http://www.tropicalfishcentre.co.uk/Fishlesscycle.htm
If that's not an option, keep the water decent, and wait the cycle out, hopefully they'll live.
This happens to most new fish keepers, and I hope it dosn't get her hopes down. Best of luck to your two and the fish.
IMO get the ammonia and nitrites down, fast, with water changes, and keep them low.
The fuzzy eyes you see is ammonia burn, and aslong as you can keep the water in better condition they could survive.
Your best bet would be to re-home the fish in a cycled tank and do a fishless cycle with pure ammonia. That way you can care for the sick fish and get the tank cycled ASAP, without being cruel to some cheap fish.
Here's a read on cycling and how to do it fishless.
http://www.tropicalfishcentre.co.uk/Fishlesscycle.htm
If that's not an option, keep the water decent, and wait the cycle out, hopefully they'll live.
This happens to most new fish keepers, and I hope it dosn't get her hopes down. Best of luck to your two and the fish.