jack russell problems :(
I recently adopted a stray jack russell, he is very very smart but its getting really difficult to train him on anything. I use positive reinforcement but when he does something wrong im not able to discipline him because he diesnt take offence to anything. Ive tried grabbing him buy the scruff of his neck, harshly saying no, even popped him on the nose a few times but he just doesnt understand it, he htinks im playing and just keeps going about his business. Please help any advice would be greatly appreciated!