How long does it take a jack Russell puppy to grow to adult size?

Answer:
Usually they will grown to adult size by there first birthday! Usually for small dogs they say 7 or 8 months but i noticed that they actually don't finish until they are closer to one year old.
mine stopped growing at 8 months
First answer by ID1659379229. Last edit by Cai babby. Contributor trust: 4 [recommend contributor recommended]. Question popularity: 1 [recommend question].