6 Months old,get rid of your mate he hasnt a clue,you will wreck the dog its a pup even if it did enter it would get smashed to bits a jack before you know it wait wait wait you need to have patients in this game,the only patients we are going to here about is the wee pup hold it back untill 12months to 18 months and see what hes made of with an experienced dog,dont let him off lead round holes cos if you keep shouting at him no when he trys to go he never will! Good luck take it SLOW.
Id be showing my dogs more respect than u show ur mate.. If i were u id get in with some lads that know a