It may be that having something right up at the neck is bothering the child. You might try a bib that is a bit looser at the neck by having the back with 2 crossover straps rather than hooking behind the neck (from the shoulder to under the arm at the opposite side). This would slip over the head. You might attach a bit of velcro where it connects on the sides to allow for growth or just make the straps a bit longer and let them out as the child grows..