Is this normal?? Help

My daughter got her shots April 1st and we also had to change her formula to neosure so she can gain weight. Right now we are making the bottles at 4 oz with the 2 scoops so it’ll stay down. She has done pretty good with the formula but now she only wants to eat 1 oz or maybe 2 then she’s done and she wants to sleep a lot more. The wonder weeks app says she has 9 days left because she’s going through a leap, is this normal not wanting to eat much and sleep more?