My 9 week old Lab had a bad reaction to drontal liquid wormer. He was 9kg and I gave him 9 ml as per box. My poor fella didn't go sleep. He was awake from 12pm to nearly 9pm. He was going crazy, I had puppy school. That was a waste, his concentration lasted 2 mins. Not even interested in chicken. It was very distressing for him and me. Have others had this with there puppy?