water dragon health

Question
hi wonder if you could help me with my water dragon health. what it is I have got 2 water dragons, have had them for about 7mths with no problems. At the wknd I was given another 2 from the local reptile shop as they were rescues. One of them is very active like the other 2 but the other one is some what lazy and likes to sleep alot and when it does open its eyes it looks like they are covered in a white mucus

Answer
 Anytime you have a lethargic tropical reptile you should assume that there is a health issue.  Reptiles hide illness or injury until they can't do it anymore.  I would take both the new dragons to a good reptile vet for a complete check-up with fecal and blood panel to rule out any infection nor infestation.  This would include the milky eye.  I am assuming you have these two in separate quarantine area.