Gastrointestinal inflammation can be caused by a variety of reasons and can affect the health of dogs and cats. Here are some of the common symptoms that can indicate inflammation of the digestive system:

Common symptoms for dogs
Vomiting
Repeated or frequent vomiting.
Diarrhea
Soft or liquid stools, sometimes with blood.
stomach ache
The dog may show discomfort or pain when its belly is touched.
lack of appetite
Decreased appetite or irregular eating.
fatigue
Low energy levels, sleepy.
Abdominal swelling
Swollen or enlarged abdomen.
bad breath
Bad breath may indicate problems with the digestive system.

Common symptoms for cats
Vomiting
Recurrent vomiting, sometimes with hair or an unidentified substance.
Diarrhea
Soft or liquid diarrhea, sometimes with blood.
lack of appetite
Decreased appetite or irregular eating.
stomach ache
A cat may be sensitive when its belly is touched.
bad breath
An unpleasant smell from the cat's mouth.
changes in behavior
Searching for hidden places or impatience.

If you see one or more of these symptoms in your pet, it is recommended to contact the veterinarian for a thorough examination. Gastrointestinal inflammation can be a serious medical emergency, so it is important to act as soon as possible.