She may not be hungry because all the milk is filling her up.

Try cutting back the amount of milk in the bottles to about 180ml and limit it to 3 per day - 1 when waking up, 1 after a nap, 1 before bed. You should see an increase in appetite then.

Offer her her favourite foods and if she likes finger food encourage this - maybe some brightly coloured chopped fruit or tiny sandwiches? Home made crumbed chicken and fish? Maybe with some sauce to dip? Pasta?

After 12 months of age milk is not such an important part of their diet and they should be getting more nutrients from food. A small piece of cheese or small tub of yogurt is the equivalent of a cup of milk - if you are worried about calcium. The other thing you might consider is getting rid of the bottle altogether - babies naturally drink less from a cup then they do from a bottle (sometimes easier said than done though, my DS took a cup fairly easily but my DD won't have a bar of it).

Also, they aren't growing as quickly so even though they are older it is common for the amount they are eating to actually decrease.

Try it for 3 days and see what happens - if she refuses the first couple of meals don't freak out too much, she won't let herself starve. It will be a bit of a change for her if she's a bit addicted to the bottle. My DS was like this, in the end I decided I just had to trust him to regulate his own appetite and I did note that on the days he drank less milk he ate more.