Can someone help me my 18 month old daughter is a fussy eater there are some days that i give her…

Can someone help me my 18 month old daughter is a fussy eater there are some days that i give her everything i can think of but then she eats nothing and then the next day she eats wonderful.

Question 2:

I am struggling with my 18 month old daughter brushing her teeth she started theething when she was 6 months old so i started brushing her teeth and she loved to brush her teeth but for a while now i have been struggling the one day she will love brushing her teeth and then the next day she dos not want to brush her teeth at all what can i do to make it more fun i will try anything to make it work permanently and not one day loving it and the next day hating it