As soon as Maricopa County Sheriff's Office Detectives opened the door, two dogs were waiting, and that was just the beginning.
They found more than a dozen cats, even one dead cat, and the floor of the home was covered in feces.
One cat and dog had to be taken to the vet immediately.
"It's like ant trails, there's so much clutter in there, there's no place to sit down, the animals were all over the house. They were all covered in feces, they had respiratory infections, it's deplorable," said Detective David Evans.
From the street, you can't miss the clutter outside the home.
MCSO says a tip led them to the house Wednesday, and they got a search warrant and entered Thursday morning.
@RealSheriffJoe Animal Crimes Det. arrest 67yo Lucille Willis for animal cruelty. Seized 20 cats, 3 dogs, & found 1 dead cat.@MCSOChrisDetectives in total found 20 cats and three dogs.
— Maricopa Sheriff (@MaricopaSheriff) March 19, 2015
Neighbors say they want the place cleaned up.
"Everybody has asked and she just thumbs them... I have been living in this neighborhood since 1992, and it has been that bad since 1992," said Brian Lervold, a neighbor.
Video from MCSO as they searched the home shows them finding one of the dogs sitting in a pile of junk, covered in feces, it could barely move and was taken to a vet.
The dogs eyes and jaw are in bad shape; it'll survive, but vet doesn't know if he would have lasted much more than six months in the conditions he was living in.
"With all this going on, it could have been much shorter than that," said Veterinarian Bernard Mangone.
Detectives brought Willis in for questioning, and she was held on suspicion of 23 counts of misdemeanor charges for failing to provide adequate shelter and 23 counts of misdemeanor charges for failing to provide necessary medical care.
The Associated Press contributed to this story.