:hi all i,m a real novice here but hoping for advice concerning aggression towards my 12wk old shih tzu x jack russell from my daughters 3yr old jackx only when the pups jumping up to play ,all we are able to do is distract the pup but it,s not solving the problem, hope someone out there will know what to do as i look after the dog every day whilst my daughters in work,would a dog behavourist work? from montii never joined a forum before so really looking foward to this!!!