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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]
Waardenburg syndrome type 2A (with a mutation in MITF) has been found in dogs, Fleckvieh cattle, minks, mice and a golden hamster. [51] Degeneration of the cochlea and saccule , as seen in Waardenburg syndrome, has also been found in deaf white cats, Dalmatians and other dog breeds, white minks and mice.
Cropped ear: Shaped by cutting; see cropping. Drop ear: An ear that folds and droops close to the head, such as the little known Blue Lacy. Also called a pendant ear. Natural: Like a wolf's. Prick ear: Erect and pointed; also called pricked or erect. Rose ear: A very small drop ear that folds back; as in the greyhound or bulldog.
Dogs with unpigmented skin on the nose may develop this cancer from long-term sun exposure. [165] Perianal gland tumor (also called hepatoid tumor) is a type of tumor found near the anus in dogs that arises from specialized glandular tissue found in the perineum. They are most common in intact (not neutered) male dogs.
Like fair-skinned humans, white Boxers have a higher risk of sunburn and associated skin cancers than darker Boxers. The extreme piebald gene, which is responsible for white markings in Boxers, is linked to congenital sensorineural deafness in dogs. An estimated 18% of white Boxers are deaf in one or both ears, [15] though Boxer rescue ...
Computerised tomography (CT) can be used to determine if disease is present in the middle ear. [12] Whilst hearing loss is a common symptom in many diseases of the ear, for example in otosclerosis (abnormal bone growth in the ear), [3] the white, chalky patches on the tympanic membrane are fairly characteristic of tympanosclerosis ...
The tympanic part of the temporal bone is a curved plate of bone lying below the squamous part of the temporal bone, in front of the mastoid process, and surrounding the external part of the ear canal. It originates as a separate bone (tympanic bone), which in some mammals stays separate through life.
A shorter Lp creates less white (Solid Colored and Residual White dogs) while a longer Lp creates more white (Irish Spotting and Piebald). What separates Piebald from Irish White and Solid is the presence of a SINE insertion (Short Interspersed Element) in the S locus genes that changes the normal DNA production.