Bf: baby taking expressed Bottle

[Mrspedro]

Dd is 7wks. Taken to the breast well however she's a nightmare to take a full feed and falls asleep on the breast every single feed and so
Just nibbles and looks for a feed again v quickly..Iv stripped her,taken her off and on again etc, stroked her feet ...she's just v lazy!
She does however stay awake when fed expressed milk from a bottle and stays awake after the feed, alert and looking around ( honestly the boob is sending her into a coma :D)
Is there any harm in giving say three feeds per day from a bottle ? Well that's if I can express that much .... I'd love to sit and feed her all day in dribs and drabs but with a load of other kids here it's very very difficult !