When do Kids turn into Goats?

No exact answer could be found. Among the "experts", no definitive consensus could be reached. Some argued for months; others longer.
One expert said that kids are ready to breed when they are about seven months old and weigh about seventy-five pounds. "Kid: a goat under one year of age."
Since the definitions of "kid" vary from expert to expert, the most popular definition is thus: Baby goats are called "kids" the first year of their life. The second year they are called "yearlings," and after age two either "does" or "bucks."
Still, some veterinarians spoken to felt that once a goat can breed and bear offspring, it is inappropriate to call mama or papa a kid.
http://animals.nationalgeographic.com/animals/atoz.html