Cats should not eat oranges. Oranges are acidic fruits, and feeding them to cats can irritate their stomachs and intestines, potentially causing vomiting, diarrhea, and other symptoms.
In addition, oranges contain citrus oils and psoralen, which can cause gastrointestinal upset in cats in small amounts, while large amounts can lead to diarrhea, vomiting, and central nervous system depression. Furthermore, psoralen can make a cat's skin abnormally sensitive to sunlight, potentially causing photophobia.
