I've seen all of those styles except I haven't yet had one who was a thief. The only true noneaters I've had have all been young babies. I did notice that some of the noneater babies were from a litter that were weaker at birth than the other litters (I had 5 litters born all within the time period between August 1 to August 18.) This makes me wonder if noneaters are babies that are similar to what dog breeders call "fading puppies". Perhaps noneaters, weak babies, stillborns etc, happen when a mother has an infection while pregnant, just as this happens occasionally in domestic mammal pets.