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BLOAT in dogs is a term that describes the condition of gastric dilation and volvulus (GDV) When the stomach becomes enlarged (or dilated), it then twists somewhere between a quarter and a full turn; the twisting is called volvulus. When an animal has gastric dilation and volvulus (GDV), the openings at at the top and the bottom of the stomach twist, blocking all materials from entering or leaving. As the digestive process continues, the stomach will swell more and more. As the stomach gets larger, it can press against blood vessels and decrease circulation. This can eventually lead to death of the tissue in the stomach walls. It can also take up some of the room the diaphragm needs to expand, which makes it hard for the animal to breathe. If left untreated, the circulation and breathing problems caused by GDV and bloat can cause infections, bleeding disorders, heart failure and sudden death. GDV is most often found in larger dogs that have eaten a large or abnormal meal. What are the symptoms of BLOAT? this excellent description of the textbook bloat signs comes from Alan Cowen from the Irish Wolfhound list: The first sign you will see is RESTLESSNESS and just strange or NQR (not quite right) behavior. PACING back and forth and an unwillingness to lie down on their side is a good indicator. Many will lay down in a 'down' (Sphinx-like) position but will not roll onto one side or the other and will generally get up and pace again after a minute or so. RAPID BREATHING is another sign that something is amiss. Very often I have seen the dog lay down in the 'down' position and then stretch its muzzle towards the ceiling as if to clear an airway. Sometimes the eyes roll back in their sockets at the same time. DRY RETCHING normally follows, and then more rapid and shallow breathing. You may not notice any swelling of the abdomen at all. Irish Wolfhounds are very good at hiding a bloat. In my experience bloat seems more likely to happen at night. It may or may not happen after eating. I am not a great believer in diet or the manner of eating as the major contributing factor. Obviously a dog that gulps and snorts its food is going to be a higher risk, but I have seen more bloat/torsion episodes following a stressful situation than anything else. Stress of whelping ... Stress of a dog show circuit or traveling... Stress of boarding.. Unusual changes in the routine due to house guests, etc.
(taken from the "bloat" link at http://www.magdrl.org/ Mid Atlantic Great Dane Rescue League)
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