What is the term for young rabbits born at the same time?

The term for young rabbits born at the same time is "litter." In the context of rabbits and other mammals, a litter refers specifically to the group of offspring that are born during a single birthing event. This term is widely used in animal husbandry and veterinary contexts to describe the number of young produced in one gestation period.

Understanding that "litter" precisely defines the offspring relationship helps differentiate it from the other options. While "cohort" refers to a group of individuals sharing a common characteristic or experience, it is not specifically tied to the offspring of rabbits. "Pack" typically refers to a group of animals that tend to exhibit cooperative behavior, like wolves, rather than the offspring of a single animal. "Group," while a general term for collections of animals, lacks the specific connotation of simultaneous birth necessary to define young rabbits accurately. Thus, "litter" is the most accurate and contextually appropriate term to describe young rabbits born together.