Gastroenteritis is the inflammation of the stomach, small and large intestines. The severity of the infection seen in the extent of mucosal irritation, invasion or even ulceration, causes very acute symptoms like severe and sudden vomiting and diarrhea.
The definition of inbred is someone who is born from people who are closely related, or is something that exists in a person or animal from birth. When two cousins get married and have a child, this is an example of a time when the child isinbred.
The term 'purebred' refers to a dog which is born of two dogs which are registered as being that particular breed. A dog can not become kennel club registered as, for example, a border collie if its parents are not both a border collie. Therefore, that dog will not be able to sire a litter of purebred puppies. Purebred dogs have been bred for many centuries for specific traits and characteristics. When you breed a purebred dog with another breed, these characteristics are 'diluted' meaning that there is an introduction of other traits.