In todayâs world, weaning is not done to aid the mother. Rather, it is done because puppies generally make their way to their new home at about seven weeks of age, and since their mother is not going with them, the pups need to have their gastrointestinal tracts accustomed to eating commercially prepared foods.
Causes of stomach ulcers. Stomach ulcers are usually caused by Helicobacter pylori (H. pylori) bacteria or non-steroidal anti-inflammatory drugs (NSAIDs). These can break down the stomach's defence against the acid it produces to digest food, allowing the stomach lining to become damaged and an ulcer to form.
1 Helicobacter pylori (H. pylori) -- H. pylori, a type of bacteria, is responsible for most ulcers. 2  This organism weakens the protective coating of the stomach and first part of the intestine and allows damaging digestive juices to eat away at the sensitive lining below.ntroduction. Peptic ulcers -- open sores in the lining of the stomach, esophagus, or duodenum (the first part of the intestine) -- are common. According to the American College of Gastroenterology, about 20 million Americans will develop an ulcer during their life.