Going to the veterinarian
While she called her grandfather, she collected both cats and took them to the veterinarian’s office. They were both very malnourished and in need of attention. They had been left alone in that house for days without food and little water. But where did this second cat come from and how did it get inside?
Agatha finally got a hold of her grandfather on the phone who told her everything. He was happy to hear that Agatha had found his other cat named Wendy. He had gotten her just a few weeks ago and never mentioned it to her before. This explained everything, Agatha laughed when she heard it.