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.
The most common cause of damage to the mucous lining is infection of the stomach with a bacterium called Helicobacter pylori (H.pylori). Most people with peptic ulcers have this organism living in their gastrointestinal (GI) tract. On the other hand, many people have this organism living in their GI tract but they don't get an ulcer. Other factors can make it more likely for you to get an ulcer, including: 1  Using aspirin, ibuprofen, or naproxen. 2  Drinking alcohol excessively. 3  Smoking cigarettes and using tobacco.