Gastropexy, is when they suture the stomach to the body wall. It does not prevent bloat, it prevents gastric dilatation volvulus, or a twisting of the bloating stomach. It is GDV, that kills dogs. Due to the twisted stomach, blood supply is cut off to the intestines. That is fatal.
If you plan on spaying her, I would tack her as well. As someone who had dealt with a dog that bloats daily, it's terrifying. My girl never twisted her stomach, but we tacked her to prevent that. It will not hurt and can save your dogs life.
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