hello mate,my thoughts on a dog jumping have changed over time all mine can and do jump and always were encouraged too untill one had an injury to his wrist... it was a real blow my best lamper is now only fit for daytime ferreting and light work now im always keen to look for other routes through hedges under gates etc.. not meaning to put you off its ussfull for a dog to jump and injurys can come with the teritory but caution be sure of your ground conditons.. cheers