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.
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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.