What age and breed is the dog?
Mutt...looks to be a bulldog mix. 6 months old. Learns fast. Knows sit, speak, shake and pretty well at stay. Broke the hand biting thing pretty fast. My fiancé's and her daughter's dog. Already 35lbs or so. I told her they need to be in control of her because she will be a big dog.
Agree with either the knee to stop them or have your visitors turn your back to him/her. Our dog loves to jump and when our visitors listen and turn their back until she calms down she learned real quick that jumping makes people ignore you and sitting or just standing there allows them to pet her. Took about a month with our dog and now she knows better.
You're right, the sooner they learn the easier it will be on everyone.
