Treat for Fido is a phrase that refers to a special reward given to a beloved pet. In this case, the crossword solutions for the term are BISCUIT (7 letters), BONE (4 letters), and ORT (3 letters). BISCUIT is a type of baked food made from flour, fat, and other ingredients. BONE is a hard, calcified tissue found in the bodies of animals. ORT is a small piece of food left over after a meal. Together, these three items make up a delicious treat for Fido.