What can you write about bio? You can make it chronological and start from when you first got her. Where and why did you get her? Then, describe the day you took her home. Was there any adjustment period?
You can tell stories that you remember about her. Were there any funny ones? Did she do anything repetitive? Did she have a favorite spot in the house? Did she have a favorite toy or treat?
Proceed by describing her personality. What was she like? What things did she enjoy or what annoyed her?
Then conclude in what she has contributed to your life. Tell about the bond that was formed. Anyone who is lucky to have raised and lived with a pet, know that their love was pure.