Could my milk be running out after 9 months?

[Feierabend]

DD2 is 9mo and still has about 4 breast feeds a day. However, in the last few days she's only sucked for a few minutes, then came off and cried for more so I had to make up a bottle for her as well. The only time my breasts feel full now is in the morning. Is this the beginning of the end? I stopped bf dd1 around this age but don't remember feeling like there wasn't enough milk.

maybe she just not really need it and just let her have a big feed at morning and before bed and maybe bottle in day .

You don't need to feel full to have milk that feling dies down once your supply settles down to what the baby needs so try not to worry.
Making up the bottle and giving her that could affect your supply though as your breasts won't know to prepare that milk for want of a better expression.
BF is supply and demand if you keep feeding your breasts will keep producing so try and persevere and keep latching her on.
DS did the same thing about this age and I just kept persevering with it and eventually he did drop a feed or so during the day himself over this period.

Try switching breasts when she comes off and cries for more - even if you end up giving the same breast more than once.

Switching breasts produces the same result - sucks for 2 minutes on one side, 2 minutes on the other, still hungry. She's eating loads of solids at the moment as well. Since she'll soon go to nursery all day I think I might as well drop the daytime feeds now and replace them by bottles. It just seemed more convenient to bf than making up bottles. Thanks everyone!

It possibly will produce the same result though especially if you have begun replacing them with bottles a bit of stimulation back and forth will bring your supply up again.
ALthough if she is starting nursery soon this may be a good time to progress onto the bottles for you rather than fight this out a bit then another fight to give the daytimes up and then another fight to drop them again at a later date.