Never had collies but we have a 9month Lab.
Make sure you get a cage. You will be glad you did. Get him/her to use it of his own accord and treat him when he goes in and only when he goes in. Keep using this meathod untill he goes in on his own when you tell him too then you can start to close the door to the cage. This will not be as scary as shutting him in from day one.
Get a whistle and clicker and a BIG bag of treats. Get him used to basic commands like, Sit, Stand, Lay down, Stay, Come here, Down and No. When you tell him to do anyone of these commands reward him with a treat and a click from the clicker ONLY when he COMPLETES the command. Once he gets used to it try him with less treats and use a toy instead, alternate them. Treat in one session and a toy the next.
When you are out walking for the first time be it on the street or park, keep him on a lead and use the commands and treat as needed. The best one to use is the 'come here' whilst on the lead. If hes pulling or trying to get away tell him to 'come here' whilst you are stationary and only treat him when he comes back to you even if it is only a few yards. If you see him sit down or walking towards you even if its at home, reward him and use a clicker while you say the command word. Training doesnt have to be when you say what to do if he does it by himself even better he will get to know doing things like sitting by himself will reap the rewards.
If you are out in a dog walking park and he is on a lead and a dog who seems friendly comes up to him let him off his lead. This is important as dogs tend to be more aggressive when on leads towards other animals. Let him off and they will run around playing, getting exercise and worn out while you stand there chatting to the other dogs owner.. Its all good fun.
Using a whistle for long distance recall is good and that can be started soon as hes off the lead running around the park with other dogs. Dont expect results right away, we started using our whistles about 6 weeks ago just so he gets used to it whilst we are out. Now, 8/10 times he comes back, if he doesnt we say 'see ya' and walk the other way, he soons comes back and as he does we blow the whistle.
Its hard work at first as puppies but it very rewarding when he comes back to you or does what you want him too. Just be patient with him.
Our dog has gained our trust now. We leave him out of the cage at night but still secured in the dinning room and today we left him out whilst we were both at work. He was on hs own, with 2 cats from 2pm till 8:30 tonight and he was completely fine but he is used to being on his own for that ammount of time. Not ideal but that is what he knows and thats what he understands. He has long walks and so should yours they love it.
Dexter 8 (ish) months ago
Dexter at 7 months ish