A raid of a cat foster home in the southeast Twin Cities led to the discovery of 60 dead animals and 40 live ones living in appalling conditions.
A 25-year-old woman from Castle Rock Township was arrested in connection with the discovery at a property near Farmington on Thursday, Dakota County Sheriff's Office said.
Staff from the Animal Humane Society of Golden Valley joined police on the raid, and said they seized more than 40 live animals that were "living in extremely unsanitary conditions," as well as the remains of more than 60 dead animals.
The woman and the address are registered under a nonprofit named "Minnesota Foster Cats and Kittens."
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The Animal Humane Society says it had worked with her organization in the past, but had since ended the relationship.
Most of the pets were cats, the sheriff's office said on Friday, along with five dogs, a rabbit, a hamster and a pig.
Police also revealed that the homeowner had told police he'd visited the property in November and everything seemed normal.
The woman has been released without charge at this stage, with Dakota County Attorney James Backstrom saying further investigation is needed to determine who's responsible for the animals' deaths.