How Long Until a Border Collie Matures?
📅
👁 3911 views 💬 40 replies Q&A
A
Expert Answer
A Border Collie generally matures around 8-10 months of age, entering a slow-growth phase after 10 months, by which time its size is close to that of an adult and will not change much.
The period from 3 to 10 months after birth is the Border Collie’s rapid growth stage; to support normal development, provide enough nutrition during this time to avoid slow growth or other negative effects from poor nutrition.