Simplify the following text for a Grade 7 native English-speaking person.
Original: He thinks humans are cruel since he was abandoned by his original owners , and at first does not agree to help Shadow , Sassy , and Chance because they are `` pets '' .
Simplified: He thinks humans are bad since he was left alone by his owners , and at first does not agree to help Shadow , Sassy , and Chance because they are `` pets '' .