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.
Helicobacter pylori. Research studies have shown that most ulcers are caused by an infection by a bacteria called Helicobacter pylori -- also referred to as H. pylori. While the other factors listed below can also cause ulcers, H. pylori is now considered the cause of most ulcers. The H. pylori bacterium is found in the stomach, and along with acid secretion, can damage the tissue of the stomach and duodenum, causing inflammation and ulcers.