well my cousin I went to get a pair of labs a couple of weeks ago and now he noticed the male and female not being very active today so he took a better look and he saw that 1 of the males eyes has swollen up or looks quite larger than the other. The female on the other hand is not looking so well the eye I guess looks like its gonna fall out??? I just took 2 pictures of the female the male wasnt wanting pics. also he has 3 other smaller labs in there that look just fine or haven't got what the older ones have yet?
Also the tank that he had them in was running for a couple of weeks prior to when he got them.
