Hi so I have had a cat for about a year already and last month on the 20th which would be 4/20/107 she gave birth to 4 kittens. everything was going well and she was feeding them and just saying no one knows who their father was. Anyways its been about a month and today all were in a room and i believe the window was open. they were all in a room and i left for about an hour or hour and a half. I came back and only one was there with the momma cat. ive searched the back yard all over the house and the front yard and i couldnt find them anywhere. Ive let the momma cat go outside hoping she took them somewhere and that she will bring te back. Can someone please tell me whats going on and what i should do. thank you