On Monday, the stray I took in gave birth so 6 healthy babies (and undeveloped still born.) 3 tabbies and 3 tuxedos. Today I noticed before she gets up to use the letterbox or eat, she SORTS them in little piles about 3 inches apart BY COLOR. Every time she gets up. She treats them all equally... Is this normal or do I just have a cat with an odd quirk???