problems with my rats health

I need to see if anyone can help me. I am new to this site. I have been having some health problems with my solid white/red eyed rats. It seems that when they get stressed or moved their faces swell and turn a little blue and they seem to have something happening to their eyes. Does anyone know what is happening. I have completey changed all of my breeders and it is still happening. I breed, rexes, dumbos, dumbo rexes and regulars. My regulars are usually feeders but I don't want to feed the ones that are having problems. Also the white rats seem to be in pain when we pick them up, they squeek like they are in pain. Can anyone hlep.

I feed them Mazuri rodent feed. So I don't know if it is the food and it doesn't happen to all of them.

If thats what they have been on for a long while that cannot be it.I had a albino not too long ago that had some skin problems.I gave her to a friend who wanted to care for the skin issue.I was putting some stuff on it.It was not working.She is putting a vit. e oil on it.The rat also has a upper resportory infection.Maybe its just albinos.They seem to be harder to keep than colors.

Mazuri is a cheap food.The food value is not high.Its fine as a mix.

You really need to get your rats to the vet. Considering the ocular issues, it sounds like they might have SDA. Either way, your rats are suffering and they need immediate vet care.