Specific breed brochure - Breed Nutrition

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© Bussadori A heart function that requires monitoring Large dogs are less affected by degenerative heart disease than small dogs, although there is a real risk of heart pathology. It is said to be 3.7 times higher in the former than in the dog population as a whole (Deeb and Wolf, 1994). Heart diseases that may be encountered Breed predispositions to cardiovascular disease have been identified in Rottweilers. The most common heart diseases are subaortic stenosis (Manczur, 2003) and dilated cardiomyopathy (Sisson et al, 2000). The breed was also very well represented in a study on atrial fibrillation (Menaut et al, 2005), a very common heartbeat problem among dogs suffering from dilated cardiomyopathy. The risk of subaortic stenosis is 5.4 times higher among Rottweilers (Gough and Thomas, 2004). This disease is characterised by lesions of the aortic valves that disrupt the flow of arterial blood, creating a specific heart murmur. There may be no clinical signs and the diagnosis is made during routine auscultation. Ultrasound showing dilated cardiomyopathy in a large-breed dog VG AG A right parasternal long axis view shows the dilatation of the left atrium (AG) as well as the spherical shape the left ventricle (VG) tends to assume. 16 Dilated cardiomyopathy (CMD) is the second major heart disease affecting Rottweilers. This disease is characterised by the large-scale dilatation of the heart cavities, together with thinning of the muscle wall. Ultimately, the myocardium* is unable to contract enough to pump blood around the body. Rottweilers probably have a genetic predisposition to DCM, although the disease is often linked to too low a plasma taurine and/or L-carnitine level.
The recently developed Doppler ultrasound technique appears to be more promising than other current ultrasound techniques in detecting DCM even before lesions develop (Chetboul et al, 2004). Early diagnosis helps prevent affected dogs from being used for breeding before they manifest signs of the disease. Possible link between dilated cardiomyopathy and taurine deficiency The link between taurine* deficiency and feline DCM (Pion et al, 1987) has led to studies into the role of taurine in canine DCM. Taurine is an amino acid normally produced by dogs, but in the event of DCM the blood taurine concentration is often low. Taurine regulates the heartbeat and protects the heart muscle cells (Satoh and Sperakis, 1998). A simple blood test will reveal whether the dog is deficient in taurine, as it is present in blood cells. A retrospective study shows that the average dietary consumption of taurine is not significantly different between dogs with and without taurine deficiency (Freeman et al, 2001). The taurine deficiency could develop as a consequence of higher requirements or specific metabolic abnormalities. © Bussadori 1 2 17 Case of subaortic stenosis: ultrasound examination The inadequate production of taurine found in some breeds, like the Rottweiler, may induce the development of dilated cardiomyopathy. A 2-D ultrasound reveals hypertrophy of the interventricular septum (1) and the back wall of the left ventricle (2). © J.-M. Labat
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Page 7 and 8: … to the tip of their nose Appear
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Page 15: The well-balanced proportions of th
Page 19 and 20: Objective #2: facilitating the use
Page 21 and 22: - Chondroitin sulphate is a compone
Page 23 and 24: Kibble size When dogs are forced to
Page 25 and 26: Helping heart cells neutralise free
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Page 29 and 30: Key innovations for pedigree dogs b
Page 31 and 32: EVERY STAGE OF THE ROTTWEILER’S L

Specific breed brochure - Breed Nutrition

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