We had the same problem with Jermy.... what worked for us (and not right away, through a lot of repetition and patience) was saying 'no' and literally taking my hands away (sitting on them for example) so as to remove it from his sight. sometimes he would get frustrated and bark but i would ignore and not play with him or pay attentin to him. Getting up and leaving to another room worked well too, basically anything to remove the hands from his access after saying 'no'. i am glad to report that this worked well and at about 12-14 months he SIGNIFICANTLY improved.
Mommy to two amazing boys and one awesome girl:
Monkey and Amy (cats)
“Dogs believe they are human. Cats believe they are God.”
"The average dog is a nicer person than the average person."