Tag Archives: Rhodesian Ridgeback

Paraparesis: Anomalous diseases

Dermoid sinus Clinical signs: Dermoid sinuses more often occur in the cervical region but can involve the thoracolumbar region (). Neurological examination is normal in the non-communicating form but neurological signs may occur if the sinus communicates with the dura or becomes infected (). Neurological signs reflect the neuroanatomical localization of the sinus. Close inspection of the hair on the midline may reveal abnormal placement. Pathogenesis: Dermoid sinus is an inherited neural tube defect in the Rhodesian Ridgeback () but has also been reported in other breeds (). The defect results from incomplete separation of the skin and neural tube during embryonic development (). The sinus often extends from the skin to the supraspinous ligament as a closed sac filled with keratin debris. Communication with the subarachnoid space can predispose to meningomyelitis. Diagnosis: Diagnosis is based on physical examination; radiography can be used to evaluate the extent of the sinus. Contrast radiography, using a non-ionic contrast medium (e.g. iohexol), determines whether the tract is closed and non-communicating or open and communicating with the spinal canal. Myelography determines the amount of spinal cord displacement. Read more […]

The faults and defects of the breeds: Hounds

Afghan Hounds Elbow dysplasia; Malformation of articular surfaces of proximal radius and ulna; Thyroid disorders American Foxhounds Spinal osteochondrois (affects the ability to run) Basenjis Hip dysplasia Basset Hounds Vertebral deformity with pressure necrosis results from anomaly of third cervical vertebra; Achondroplasia (foreleg lameness caused by anatomical irregularity; cartilage of growth plate grows in irregular directions and is scant); OCD (osteochondrities dissecans) (shoulder); Osteodystrophy; Radial carpal joint irregularity; Patella luxation, medial or lateral that produces lameness at four to six months of age; IVD (intervertebrate disk disease); Panostetis Beagles Hip dysplasia; Epiphyseal dysplasia; IVD (intervertebrate disk disease) Black and Tan Coonhounds Hip dysplasia (high incidence); Polyradiculoneuritis; Coondog paralysis Bloodhounds Hip dysplasia; Elbow dysplasia Borzois Thyroid disorders Dachshunds IVD (intervertebrate disk disease); Osteoporosis clinically similar to swimmers, with radiographs showing dense bones and abnormal bone resorption; UAP (ununited anconeal process); Patella luxation; Achondroplasia; Thyroid disorder English Foxhounds Osteochondrosis Read more […]

Mysteries of color

In my time I have read a lot of books on dogs written by people from many breeds – there is one point that has always interested me but which I have never seen positively answered. It arises in many different breeds, especially in the bull breed subgroup, and in several different ways., The point is the genetic difference between the colours red and fawn, if indeed there is a genetic difference. Old sourmug.the Bulldog is behind many breeds in which these two colours occur, perhaps not quite in. his present day form, but undoubtedly behind them an many generations ago. Now the Bulldog appears in a wide range of colours, two of which are rich deep red and pale smutty fawn – light fawn with dark tip to the hairs. He a so appears in lighter shades of red and deeper shades of fawn, with or without smart markings, sometimes so that it is not at all easy to say whether a particular dog’s coat is pale red or deep fawn. Similar In the first example mentioned above, there is a very marked difference between the two dog’s colors.. In the second one they are very similar indeed. both are recessive to brindle and probably dominant to black and tan but how ,genetically, are they related to each other?. Is the deep red dominant to Read more […]