Hi Michelle,
I have had a daycare in my home now for 17 years and guess what? Toddlers get teeth and they usually chomp down on something or someone for various reasons by the time they hit 3 years old. Its part of development. "I've got them, I'm gonna use them".
By them telling you that your son has developed a "pattern" of biting, they are saying that your son is a smart cookie and has figured out how to get the results he's looking for in the quickest way possible,- by biting.
Most children this age are starting to develop language skills and don't quite master them until they are well into their second year. Its easier to bite and take the toy then it is to ask for it,- at his age. You've got about six months to help him.
What to do? The daycare should be trained in this area and should know that a biter needs a shadow (extra supervision) to help him with the why's. Why is he biting, is it language, is it frustration, is it anger, is it becoming a social skill?? Someone should be assigned to him to help give him the language skills, the distraction, the calming skills, or the acceptable social skills - he needs right now at the age of 18 months.
You at home can teach him his senses, by helping him learn skills like we hear music, the door bell, daddy's car, etc. We touch the sofa, the dog, our toys, etc. We bite crackers, pretzels, teethers, sippy cups, etc. Ask him do we hear the sofa? Do we touch the fire? Do we bite mommy? Nooooo....you silly billy you. Have fun with it!!
Hope this helps, call me if you want more cause I could go on and on. Remember, teach him not punish him. Help his daycare to understand his needs right now.
Good Luck,
D.
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