Definition of statement for English Language Learners. : 1  something that you say or write in a formal or official way : something that is stated. : 2  an opinion, attitude, etc., that you express through the things you do, the way you dress, etc.
A dog owner should have an idea when the pet will go into heat. The reproductive cycle varies from breed to breed. Generally puberty will occur as early as 6 to 12 months in small breeds and as late as 2 years in large breeds.
Heat Period in Dogs. The heat period in dogs can start as early as 6 months of age. Some larger breeds will become mature at 12 or 18 months. Only female dogs come into heat, and for a few days during this period, the dog can become pregnant if fertilized by a male dog.