The first part of the study showed that giving birth multiple times was a significant contributor to obesity regardless of age, with mice who gave birth multiple times being up to 45 percent heavier than those who had a single litter at the same age that the first animals had their fourth. (physiologyinfo.org)
If you're caring for a litter of puppies and notice that a couple of the little guys look totally different from the rest, you might just be dealing with a case of two fathers for a single litter. (dogcare.dailypuppy.com)
Within a single litter of crossbreed puppies you can have a wide range of different sizes, colors and personalities — there is no way to know what the puppies will be like as adults until they grow up. (pawster.com)