After media coverage Mrs Saunders received a number of calls that led to an address in Omakau.
When she went to that address, there was no-one there.
However, "there was a bitch there that was lactating but there were no puppies'' and she was sure the puppies belonged to her.
"My instinct would say that what she did was take them into the vet and make up the story . . . she made up the story because she thought probably the vet would be more likely to take them.
"So I assume the puppies were never in the bin.''
She said unfortunately the SPCA, unlike the police, cannot charge someone for wasting their time.
"So we can't make her accountable, we can't charge her with anything.''
Because no charges would be laid, she could not release the woman's name.
However, she said the woman and her partner had since "packed up and moved''.
"The whole process has been a huge, huge waste of our resources . . .'' "On the good side, the publicity means that we have so far got homes for six puppies . . . four have already gone and two will go up to Auckland next month.''
The remaining three puppies are living at a foster home in Alexandra until permanent homes can be found.