how can i get my daughter to stop sucking on her blanket?

it all started when she was 10 months she had a teddy that became her security blanket but 4 months later she began to suck on the ears once in a while, it became a habit 2 months after, i began to take the teddy away from her and hide when she began to suck on it... when i did hide it she began to suck on all her stuffed animals so i had to hide all of her stuffed animals and now she sucks on the corner of her blanket n if i take that blanket away she will suck on anything that has fur or its soft. but she only does this when she is comfortable or ready for a nap or ready to go to sleep at night.i try giving her things to distract her from that also with milk ect... but it doesnt work. is this normal? a lot of people tell me she will grow out of it but i worry she is 2 1/2 now... what can i do?