Hello, I have 7 indoor rescue cats - one stray feral outdoors that has a nice insulated house and plenty of food. Today I went out to feed the feral and talk to him and a strange cat came out of his house - upon closer observation there are two tiny kittens in the house. I have not seem momma come back today and although the house fairly warm, not for tiny kittens that appear to be about 3 weeks old. Do I let them be today and hope mom comes back or do I scoop them up and bring them indoors and try to feed and take care of them? I did pick up some milk supplement at the vets today with bottles just in case.