So we've fed our dogs raw but over the holidays we weren't able to get any and bought a couple of bags of kibble for them. All 3 of them started to get a large amount of gunk in their eyes, like sleep in their eyes. I could clean them up every hour and they'd just get more. After a couple of days back on the raw food, they're back to normal. Know what causes this? Is it just some kind of allergy? We had been considering switching to kibble to save money but they just seem so much healthier on raw so I don't think we can bring ourselves to do it.