our 2 run together well BUT kavik will keep stopping to sniff/ pee on newish tracks , he holds mishka up when he does this & she is enjoying the running but can't keep going because of kaviks stops , i had my husbands drive up the track today & let them pull rigf chasing after car which they ran really well after & went really well , this was the way we trained our last dogs to run in harness , works well too , gives them something to chase after & kavik runs properly , NO STOPPING . They both run really good on bike & need no encouragement to go then . mishkas doing really well at present , even getting a bity more excited on countdown to GO .