One of my outside cats, Dusty, had kittens six weeks ago. We live in a rural area. She had them away from the house and 2 weeks ago she brought one up to the house in the garage where there is food and water for the outside cats. I went to check on the rest of the litter and there were none there. Something must have gotten them. At that same time when she moved this one kitten, another cat named MIssy had kittens. Missy is Dusty's kitten and is 10 months old. None of Missy's kittens survived. I noticed that Missy hangs around Dusty a lot. Today I saw Dusty nursing both her baby kitten and Missy. Is this normal? Never seen or heard of this before.