Hi mate its true dont run them to early because it will yapppp and it wont grow right either, I had this trouble getting my first dog when I was at school and ran it to young everytime it chased as it got older yap yap yap, now after checking sites and things 6 month to run daytime and 10 to 12 month to start on the lamp, you have plenty of things to be doing until then like training to fetch and jump training which you will need.
look after your dog and it will be great..