More a dog health question than training but here goes.
I've noticed twice in the past week that my 8 year old yellow lab has had blood shot eyes. This is something new and a bit alarming for me.
One day last week, at Tangle Lakes, after walking a mile or so through wet brush in 43 degree windy weather looking for birds, when we got back to camp, I noticed he had deep red eyes, especially along the bottom. He didn't seem to be any pain over it, wasn't pawing/wiping at them, and I didn't see anything coming out of his eye. At the time, I thought it might be related to the cold weather or he might have taken a piece of branch across the face or something. It was gone a few hours later.
A few days later, I noticed the same condition at home. Inside, warm and dry, no activity that day. It went away within a few hours.
Today, we walked 5 miles out on Johnson Pass trail, where he worked really hard, but no blood shot eyes.
I have a copy of "Dog Owners Veterinary Reference Book", but it doesn't address blood shot eyes specifically, other than to say red, sunken eyes are a sign of dehydration and any eye condition is serious. I wouldn't want to admit I let the dog get dehydrated (I carry water and food for him in my pack and take breaks) but, for the sake of discussion, I'll say it was possible at Tangle Lakes. That doesn't account for the other day when it happened at home.
Has anyone seen this before or experienced it with their dog and, if so, what did you (or what should I) do about it? I'm seriously considering a visit to the vet if I see it again.