Morgan shakes when its bath time too. She's almost 5yrs old and I've been bathing her since she was 13 weeks. She's always done it. She stops shaking once she's in the tub and LOVES to dry off once its finished. That's her favorite part. She rubs herself all over and runs to the closet for me to get the blow dryer. she loves the blow dryer so much she even comes to me on non-bath days (for her) when i'm drying my hair so she can get a blast.