More than 100 cats were found in what officials describe as a "hoarding situation" at the Houston home of 60-year-old twin sisters.
Authorities arrived at the house Thursday morning after being called by neighbors.
Harris County Precinct 1 Constable's Office spokesman J.C. Mosier told the Houston Chronicle that feces were "literally 3 feet high."
Authorities fear the situation has been going on for years.
Mosier said, "We're hoping we can get them some official help from the proper government entity and we've been trying to do that."
Constables said no charges will be filed.
A Houston Society for the Prevention of Cruelty to Animals spokeswoman says the cats, which were taken to the shelter, were emaciated. One decomposing cat was found.
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