I have been taking my 17 month old spaniel/terrier cross to obedience training for over a year now and in general he is doing well. However, I have always had problems keeping his attention and focus and it has recently got much worse. All he is interested in is sniffing the ground which means our heelwork has totally gone to pieces and his (already short) attention span has dwindled to non-existant! It doesn't matter what treats I have in my hand (liver, chicken, cheese, sausage - treats he usually loves and only ever gets in training classes). Even using other people's treats only works for a short time. Any suggestions on how I can work on this? If I can get his nose off the ground he can work really nicely but he is just being a total brat atm. My instructor wants me to bring a ball to our next class as he is tennis ball obsessed so I have been using this a bit this week and have got some really nice sit and down-stays but as soon as I try moving he either stays where he is or dances round me waiting for the ball to be thrown or his nose goes back to the ground... Any advice gratefully received!