Canine kidney failure can display a variety of symptoms affecting a dog's energy levels, its ability to eat, and its level of interaction with its family. Vision symptoms associated with kidney failure develop out of deficiencies in other areas of the body directly caused by the diminished kidney function. Owners finding a pet displaying any loss of vision should immediately consult with a veterinarian.
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Protein Buildup
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Dogs suffering from chronic kidney failure may live with the disease for months or even years as it slowly progresses. Increased blood flow to the kidneys is part of the dog's natural response to kidney failure and may cause problems with the animal's vision as proteins build up in its system. This protein buildup will lead to high blood pressure, which can cause blurred vision and eventually lead to blindness, according to Marvista Vet. You might notice your dog behaving differently, such as taking corners slower or appearing lost and uncertain in familiar surroundings.
Lethargic Behavior
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Chronic or acute kidney failure will affect a dog's energy levels in different ways. Acute kidney failure onsets suddenly and may impact a canine's ability to see correctly because of loss of muscle coordination. Lethargy associated with chronic kidney failure is a much slower process. You may notice your dog sleeping more than usual, often being difficult to rouse. It may also tire very quickly and seem uncoordinated, though in most cases this lack of coordination is the result of blurred vision, according to the Pet Encyclopedia.
Dehydration
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Dehydration affects every system in the canine's body. The Pet Place notes that eyes in particular will have less moisture and appear sunken or recessed into the canine's head. Vision will also narrow with symptom of kidney failure, which will shorten the dog's total field of vision. It may not recognize family members, refuse food and be reluctant to perform any physical activity.
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