Mine started the same thing with me around 5 or 6 months. Especially to look around & see what daddy or the dog was doing. I would tell her "no maam", give her another attempt, then take her off immediatly (when she did it again) - so that she would understand it was being taken away because of what she was doing. I did notice that side laying to feed her would help a lot, but you can't always have that option. I think it just helps them and you relax and be more focused on the task at hand.
By 8 months my little girl turned me down. Just one day turned her head & wouldn't take my breast. I was sad because I had planned to go until she was 1 yr., but everyone told me that at least I didn't have to wean her & have the whole hurt feelings because "mommy was taking away babies food source!"