My two cats just had kittens about 3 weeks ago, one day apart. One cat had hers in the car port and is a really good mom. The other had hers in the barn. The barn mom moved her kittens today. I found one under the outside fridge in the car port, and can't find the others anywhere. I moved her box into the car port and put the kitten in it. I went and got mom and showed her where her baby was. She hissed at it and left. I'm worried because she has never been as good a mother as her sister is. Any advise?