Chihuahua is the first dog that stays small forever due to their genetics.
Generally, Shih Tzus' genetics dictate their size so it stays small forever.
French Bulldog's genetic growth patterns keep them small forever.
Basically, Boston Terrier maintains a small and compact size throughout their adult lives.
This toy dog breed maintains a small size throughout their lives.
Yorkshire Terriers stay within their expected size range because of their genetic predisposition.
Bichon Frise maintains a small size forever due to breed genetics and selective breeding.
Cavalier kings' bone Structure and growth patterns keep them small forever.