Acid reflux, also known as GERD (Gastroesophageal Reflux Disease) , occurs when gastric fluid  rises from the stomach into the oesophagus . 📌 Why does this happen? ✔️ Normally, a sphincter  at the junction of the oesophagus & stomach  prevents acid flow. ❌ In acid reflux, the sphincter remains open , allowing acid to irritate the oesophageal lining . ⚠️ Brachycephalic breeds  (e.g., Pugs, French Bulldogs) are more prone  due to their shorter oesophagus , making reflux more f