updated 04/06/2011 AT 9:00 AM ET
•originally published 04/06/2011 AT 10:45 AM ET
On Tuesday, the actress reported that Little Angel “got out of my house somehow and is LOST.”
Asking her 53,000 Twitter followers for help, she added, “If anyone finds her I BEG you to please contact me thru Twitter,” even offering a reward.
Bynes, who frequently posted pictures of her puppy on Twitter, shared a recent one of the caramel-coated Pom. Later that day, Bynes followed up to say that “Little Angel is in heaven now. RIP I love you.”
Little Angel was just 4 months old.
Leave your condolences for Bynes at PEOPLEPets.com.