We would not recommend that a new dog be allowed off-lead at any time while outside for the first month.  Many of these dogs have ended up in kennels because they have run off and there are far too many unknowns for it to be safe.  Try to keep them out of situations like parks where there may be other dogs running off-lead as this can create frustration and aggression. If you feel your dog needs some free running then there are training leads available to cater to this while keeping the dog safe. Contact your trainer or MADRA if you are unsure.