In Merles there are two colors of merles a blue merle which is a blue-gray color that is carried over through black and a red merle which is a dilute chocolate in the doodle breed, for some reason when produced in the doodle the red comes through as chocolate and really is a chocolate merle by color.
Chronic sinusitis, or sinus infections, cause a stuffy or runny nose, tooth pain, fever, sore throat and more. Migraines are a common type of headache that can cause severe pain, aura or flashes in vision, and tingling. Tension headaches, caused by muscle tension, are marked by pain, pressure and tightness around the head. Ocular migraine usually refers to a type of migraine that can cause temporary blindness in one eye.
This problem is rare. It affects about 1 out of every 200 people who have migraines. Some research suggests that in many cases, the symptoms are due to other problems. Regular migraines can also cause vision problems, called an aura, which can involve flashing lights and blind spots in your vision. But these symptoms usually appear in both eyes. See your doctor to find out if you have ocular migraines. He can rule out other conditions that can cause similar symptoms.