Human’s favorite pets – dogs bring a lot of positive moments in our lives. However, there are many dangerous diseases, signs of which can cause panic for the dog-owner. Animals are curious and explore the environment even by tasting it. This is especially relevant for dogs, which eat almost everything they find in their way. Sometimes their curiosity leads to significant health problems and to the necessity of surgical treatment. Description of Foreign Body Gastrointestinal Obstruction Gastrointestinal obstruction is a disorder of intestinal motor function under the influence of certain factors. There are several reasons for the appearance of this severe pathology (Pratt). The main of them are next:   * Oncology reasons as a tumor.   * The intestines twist.   * Presence of foreign body. The last of the mentioned causes is the most common in dogs. Foreign bodies can get into the animal’s esophagus, stomach or intestine with food, and in case of accidental ingestion – for example, during the game. The foreign body, which diameter is smaller than the minimum diameter of the small intestine, often leaves the gastrointestinal tract along with the potassium masses. The foreign body equal to or larger than the minimum diameter of the gastrointestinal tract causes partial or total obstruction (Pratt). Foreign bodies with sharp and traumatic edges can cause serious complications such as bleeding, perforation, and necrosis. Healthy dog’s guts are always in motion: they push their contents in the direction from the stomach to the anal hole. While moving through the intestinal tube, digestive juices are absorbed through the abdominal wall back, along with nutrients. Thus, a large amount of vital fluid is continuously circulated in the gastrointestinal tract. In the case of gastrointestinal obstruction, no matter how it is caused, this circulation is interrupted: gastric and intestinal juice is produced in the same volume, but it cannot be moved and therefore absorbed (Pratt). The increasing amount of stagnant fluid accumulating in the stomach and small intestine causes nausea and vomiting. At the same time, the body begins to lose water and a large number of minerals (mainly potassium and sodium) quickly. Water consumption during this period only increases vomiting and accelerates dehydration. The absolute majority of animals with intestinal obstruction die as a result of serious loss of water and potassium (Lindquist and Lobetti). It is crucial to see the sings of the decease. Clinical Signs of Gastrointestinal Obstruction According to Pratt, scientists identify the following typical clinical signs of gastrointestinal obstruction in dogs (513):   * Vomiting, after which the animal can be active and ask to eat.   * Forced pose – animal takes unnatural body position.   * The pain of the abdomen (abdominal wall) while slight pressure on it.   * Sometimes uncharacteristic groans.   * Reduction of fecal masses or complete absence of defecation act.   * There may be a large amount of mucus instead of feces.   * Reduced or total lack of appetite and water consumption.   * Drop in body temperature below 38 degrees.   * An increase in abdominal volume, even difficulty breathing may be observed. If