Eye problems reward speed, since the structures involved are delicate and some causes worsen within hours. Sort what you see by two questions: does the eye look comfortable and open normally, and does it look the same as the other eye? A bright dog with open, comfortable eyes sits at one end of the scale. A squinting, pawing, cloudy, or visibly damaged eye sits at the other, and the middle ground belongs to a same-day phone call rather than a wait-and-see week. Compare both eyes under the same light, and note which eye is affected, when you first saw the change, and anything that happened just before, such as a run through long grass, a scuffle, or a bath.
Signs that can usually book a routine appointment
A small amount of clear or slightly pale discharge that wipes away easily, in a dog who opens both eyes fully, shows no redness, and behaves normally, can generally be monitored and mentioned at a routine appointment. Mild watering in wind or dust that settles once she is indoors belongs in the same low-key category, provided it clears and does not return daily. Keep a simple dated note of how often it happens and whether it favours one eye. Even here, the booking should move forward if the discharge thickens, changes colour, starts to smell, or the eye begins to look different from its pair. Routine never means ignore; it means scheduled rather than urgent.
Signs that need a same-day call
Squinting, blinking far more than usual, or holding one eye partly or fully closed signals pain and earns a same-day call. So do yellow or green discharge, redness across the white of the eye, swelling of the lids or the tissue around the eye, and pawing or rubbing at the face. Cloudiness matters at this level too: a blue, grey, or milky look to the surface, a pupil that differs in size from the other side, or a visible film drawn across the eye from the inner corner — the third eyelid showing — all deserve same-day advice. Tell the clinic whether vision seems affected, for example if she misjudges steps, bumps furniture on one side, or startles when approached from one direction.
Signs that are an emergency now
Treat an eye that bulges outward, an eye with a visible tear, cut, or puncture, or an eye that has taken a direct blow, scratch, or chemical splash as an emergency and go now, phoning ahead on the way. The same applies when an eye suddenly turns densely white or blue, when she cannot open it at all and is distressed, or when eye signs arrive with collapse or repeated vomiting. While travelling, stop her rubbing the eye — a protective cone helps if one is already fitted and tolerated — and keep her calm and out of bright light. Never press on the eye, never try to hold it open for a long look, and never delay departure to photograph it.
What not to do, and what to tell the vet
Do not use leftover eye drops, drops bought for people, or a previous prescription saved from another problem, and do not attempt any home treatment of the eye itself. Owners can observe, protect the eye from rubbing, and record; examination and any treatment belong to the vet. Report the onset time, which eye, the discharge type and colour, whether she paws or squints, any possible injury or foreign material, and whether both eyes changed or only one. Mention recent boarding, grooming, swimming, or new animals at home if relevant, and take a clear photo in natural light if she tolerates it without distress. A Pet Passport from KinsLe keeps those dated eye notes alongside her visit history, so whichever clinician you reach can see when each sign began.