2 year old wont eat!

my daughter is 2 years old and the last few weeks has decided she just doesnt really wanna eat. shes never been much of a piggy anyway... but ive noticed no matter what i put in front of her cereal, nuggets, sandwiches, fruit, yoghurt anything ... she wont eat it! she only wants milk! should i take away the milk? or supplement with a toddler formula while she goes through this phase?