The kid is 5 months old. She keeps on chewing her fingers.
Should she be given a teether or should she be allowed to chew her fingers?
What are the possible disadvantages of giving an infant a teether and how should they be countered?
Give her a teether. Just make sure it's one suitable for her age, but teethers are useful for babies who want to use them and will help her with sore gums.