Fussy feeding

Irene

So my 4 month old just started to act fidgety after having just a lil bit of her bottle. She doesn’t stop drinking she seems like she still wants more but she’s moving around a lot. She’s on a lactose free formula bcuz she does have a milk allergy... so I’m kinda at a loss at what’s going on now. She’s been doing this for a week at least ... is this something that just happens as they grow ?