Kai is not fully leash trained. He will walk 80% okay about 70% of the time (sorry for the percentage

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I used early Xmas money to fund for a trainer as my knowledge didn't help. E both were a waste of time. Did not like the first trainer even tho he was recommended. I reported him. Second was quite good but by this time I only had enough money for 2 hours. It was going to take more then this. I asked the guy if he could tell me what to do next so I could do these at home. He said do what we've done this lesson ( gently pull the lead and praise the dog when he follows ect). I asked him what about after that. He said he count tell me that cos then he'd be loosing business and smiled cheekily
Kai's pulling isn't like a sled dog would pull. He just walks in front with a tight leash. It's isn't all the time. Also he can not walk in groups. When it's him and more then 1 person he pulls and jumps and walks left and right.
Can any one tell me any simple techniques I can do at home in order to keep this under control ?
He's 8 months and I'm 17, don't have a job (ie training money problem) I was told to buy a non pull harness but I don't believe that it teaches the pup not to pull, just makes it impossible for him to plus its not a permanent solution
Any one help?