(AP) – The Helen Woodward Animal Center is trying to determine if $1,600 found in a donated pet crate was a gift or an accident.

Animal care technician Amy Barnes says she was sorting through donations recently when the cash bundle fell out of a crate.

Officials at the shelter in Rancho Santa Fe, north of San Diego, tells the North County Times Tuesday all the bills were new $100s.

Barnes took the money to supervisors, who are trying to trace it back to the original owner. If it’s a donation, they’d like to say thanks. If it was a mistake, they want to return it.

Barnes says she would love it if the money could be used for the animals, but not if it means someone can’t pay their rent.