I use a halter on my 18 month old Boxer boy when we walk, it's so much easier. You have more control over the chest area and your arm isn't killing you when you come home!

Give it a try, take her into a pet store and try halters on to make sure you get one that fits. I had purchased a 31" when we first got Pudge at 8 months old and he outgrew it within 2 months! Good luck!