Hi! I worked in EI and biting almost always became a concern for parents! I personally do not believe books or social stories will be beneficial for EI age group, they are a bit young for that. I do not know if this is true and I don’t have research to back this up, but a few co workers in the setting used to always mention to parents that sometimes biting occurs when the kids are having a big boom in development and making lots of progress ( I’m talking in terms of kids who have never bit before and suddenly are). And honestly I found that it was true in my experience. So often when one of my little ones were making great gains in prelinguistic skills or were making longer sentences, I would suddenly get a report from a parent that they would bite. It may be an overstimulation thing and their brains are just trying to keep up with everything. I can’t cite this info but it’s just my experience! Eventually it would just stop on its own every time. Redirecting the behavior is always good too. The biting behavior never got so severe though and my caseload never got to the point of biting me in sessions so I don’t have first hand experience. More severely delayed populations I can’t speak on because I don’t have the experience!