There’s your cute cat video for the day, folks. After that, it’s back to all that ugly politics, etc. stuff.
I believe that is actually a feeding call. She is calling them to feed – to nurse at her breasts.
Mother raccoons also make that weird purring sound when they have their kits with them. I used to hear it at my house in the mountains. People would say, “What in God’s name is that noise?” It was that same weird purring sound. Then with a flashlight, I would find a mother raccoon with three or four kits behind her. The kits walk in back of the mother, which is probably typical.
Baby quail stay with their mothers a pretty long time for birds. In the mountains, I used to see mother quail with baby quail behind them all they time. They often run when they are in a line like that, especially if your car is coming up on them. It’s actually rather funny to watch.
I assume with most mammals and land walking birds, the kits or fledglings walk in a straight line in back of the mother when they go walking around.
Some animals like birds like to walk in lines period. Even adult ducks or geese will often walk in a line for some odd reason.