At four months old he

raisins mom

At four months old he probably doesn’t have the patience/attention span to be doing alot of training all at once. Take him out for short less then 5 minute walks mutiiple times a day.Keep treats on your side to keep him focused to you and your side.  My dog is a year and a half and when we do trick training I never go past 5 -10 mins at a time without breaks. Dogs are just like humans and will get frustrated, bored and distracted at training.  My german shepherd would pull on the leash and run into me until he was atleast 6 or 8 months.  I use to complain about walking him because it was more fun then work.  Patience ins the key.  Good Luck