Tear stain is very common in dogs and you can wipe this away yourself with a tissue or gauze wet with slightly warm water and use this to wipe away the tear stains. However if your dog is having discharge from the eye, crusty sleepers around the eye or his eyes looked red rimmed then you will need to make a Vet appointment.
Yes, bile acids can leave a stain/ lighten the fur if the cat is not cleaned off just as tears can stain a light coloured dogs fur around the eyes.
Genes.
I think it is like people. most of the human population have brown eyes. so why not dogs??
No. Huskies commonly have blue eyes.
no some dogs have blue or gray or orange
no Well, I don't agree with the answer just above. I have a dog who has green eyes. He has since I adopted him at 6 weeks, and he still does at 14 weeks. I have seen other dogs with green eyes as well, so I don't know why the person put "no" above.
maybe maybe not
Light Brown, Goldish
Just the different coloured coats blue Merle collies can have blue brown or blue and brown eyes so do some husky dogs and so do blue or red healers
pandas have black rings around their eyes and their eyes are a very very dark brown
a monkey changed it with mine
Dogs eyes do not change colour however the light may make it appear as if they do.