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.
Ocular migraines usually cause temporary vision loss or distortion in one eye, usually accompanied or followed by a headache. They are also called retinal migraine, eye migraine or ophthalmic migraines. Ocular migraines are caused by a sudden tightening (or constriction) of blood vessels, which reduces blood flow to the eye. Most last under five minutes. Afterwards, vision usually returns to normal.