Oh my! No need to yell with your fluffiness!
Thrandull, shadow figures are not dangerous. Most I have found are watchers, and are just interested in us. The cat could be spirit guide, but not sure. The child is interesting, though could be just a short figure. Shadows visit me often, as do other things. I am not afraid of them. If you are concerned, and you want them out, do a smudge of sage and drive them out. You can also use blessed water. You start at the door and work counterclockwise throughout the house, and end at the door you styarted from. Then to keep them out, you can salt the door by running a line of salt at the entrances of every opening, including window sills.
If you are more interested in them, you can try to communicate with them. Lighting a candle to honor their presence, speaking of so as you light the candle, and start talking. You will see signs rather than words, as this is how most start out. I have spirits that visit and call me by name. I believe they do this as I think they are relatives. The others are just passing through and tend not to bother me. A couple of times, my name was called as a warning to pay attention to something that I needed to take care of.
So, yes. No need to worry, as you can rid your place or yourself of them, or interact with them. But no need to fear them. Feel free to mail me if you want to talk more about this. Blessed Be...