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Wet-tail is a disease in the animal's intestines caused by the bacteria, Lawsonia intracellularis. [2] Wet-tail is a stress related illness—such stress can be caused by a variety of factors, including too much handling, change in environment/diet, extremely unclean caging, separation from mother/siblings before they were ready to be weaned, and improper caging.
Common clinical signs of Tyzzer's Disease include watery diarrhea, depression, emaciation, and a ruffled coat. [8] Other observed clinical signs include melena, depression, lethargy, and decreased temperature. [8] In muskrats, this disease is characterized by extensive hemorrhaging within the lower intestine and abdomen. [6]
It is difficult to develop an animal model that perfectly reproduces the symptoms of depression in patients. It is generic that 3 standards may be used to evaluate the reliability of an animal version of depression: the phenomenological or morphological appearances (face validity), a comparable etiology (assemble validity), and healing similarities (predictive validity).
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Wild animals can experience injury from a variety of causes such as predation; intraspecific competition; accidents, which can cause fractures, crushing injuries, eye injuries and wing tears; self-amputation; molting, a common source of injury for arthropods; extreme weather conditions, such as storms, extreme heat or cold weather; and natural disasters.
PETA warns that if the cage is too small, your pet can develop “cage rage,” a condition caused by stress that can lead to various behavioral issues, including biting, excessive urinating, and ...
The death of mourning animals is likely to be caused by depression leading to starvation or drowning, instead of the intent of suicide. Aristotle described an unverified story involving one of the King of Scythia's horses dying by suicide after having been made to unwittingly impregnate its mother in his History of Animals .
The cause of depression is believed to be due to a combined effect of genetic and environmental factors. [11] Other medical conditions, for example hypothyroidism, may cause people to experience similar symptoms as a major depressive episode. [20]