she is 5 months old

how old is your little girl? I was having a hard time with my husband doing that to our girls I had to set him down and tell him C(so) the girls are just babies they are trying to learn and then I used an example of something he had just learned and it took a few times of me seeing him being to rough with them and saying easy... that's all I had to say

idk

well my advice will be try talking to him about it and see if maybe you can get him into some parenting classes or something where he will see other dads interact with there babies . maybe like a daddy play group and maybe he can see how other dads are and be more patient and understanding