Can a dog in pain ( His is dying of lung and prostate cancer) have a discharge from his eyes? Is his pain causing this?

The pain from his cancer most likely isn't causing the eye discharge, but on top of everything else, he probably has eye infections. I noticed that you had made the comment about telling your Mom to have him euthanized. Ask her again! Doesn't your Mom realize that it cruel to let a dog suffer like this? Besides that, don't you have to make room for the other dogs in that puppy mill you're running? Hey, you're the one who asked about doing *back to back* breedings with one of your dogs, and if I'm not mistaken, you already had two litters recently and even a litter of kittens I believe.

Honestly, someone needs to call the authorities on you to have ALL your animals removed. Even though you're just a kid, what you and your family are doing and with the lack of proper Vet care, you make me sick to my stomach. Perhaps one of these days when things get bad enough and you do have a neighbor or relative that does call the authorities on your family, someone just might end up doing some jail time.

If he is in that much pain, why are you not having him humanely PTS? Honestly- it's just cruel.

So sad. Why can't you have him put down and out of his misery?

Ask your vet.

poor thing