They do start doing all sorts of things when they get to the 1 year mark!
Although you do still need to push the milk for the next few weeks at least, you can give more dairy products in her food so she still gets the nutrients. Can you move her dinner a bit earlier and the bed time bottle a bit later to space them out a bit more? Is she having the morning and bedtime milk in a cup or the bottle? If it's still the bottle, try the cup instead.
The other thing that could be having an impact is teething, that often puts them off their bottles. You could try teething gel just before a bottle to see if that helps. My DD got very fussy with her morning bottle around 1 so I gave her breakfast first, usually cereal with milk so a few oz there and then a snack mid morning with a drink of milk. That suited her a lot better. There's not rules to say when they should have their milk so you could play with the timings a bit.
HTH!
Laura