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Dogs have ear mobility that allows them to rapidly pinpoint the exact location of a sound. Eighteen or more muscles can tilt, rotate, raise, or lower a dog's ear. A dog can identify a sound's location much faster than a human can, as well as hear sounds at four times the distance. [41] Dogs can lose their hearing from age or an ear infection. [42]
Ear infections are common in dogs, particularly breeds with hanging ears, such as Beagles, and dogs with narrow ear canals, such as Cocker Spaniels. Other predisposing factors include allergies, ear parasites, and hypothyroidism. [76] Deafness* in dogs can be either acquired or congenital.
Dog with atopic dermatitis, with signs around the eye created by rubbing. Atopy is a hereditary [3] and chronic (lifelong) allergic skin disease. Signs usually begin between 6 months and 3 years of age, with some breeds of dog, such as the golden retriever, showing signs at an earlier age.
Ear positions are similar to head positions with respect to the feelings they display. Ears that are upright and facing forward indicate dominance or aggression, while ears that are pulled back and facing downward indicate fear or submission. [12] Unfortunately, not all dogs are able to communicate with their ears.
They are located behind the peritoneum (retroperitoneally) [6] on the back wall of the body. [7] The typical mammalian kidney consists of a renal capsule, a peripheral cortex, an internal medulla, one or more renal calyces, and a renal pelvis. [7] Although the calyces or renal pelvis may be absent in some species. [7]
Dioctophyme renale, commonly referred to as the giant kidney worm, [1] [2] [3] is a parasitic nematode (roundworm) whose mature form is found in the kidneys of mammals. D. renale is distributed worldwide, but is less common in Africa and Oceania. [4] It affects fish-eating mammals, particularly mink [1] and dogs. [4]
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Cystinuria is an autosomal recessive disease, [1] which means that the defective gene responsible for the disease is located on an autosome, and two copies of the defective gene (one inherited from each parent) are required in order to be born with the disease.