I don't blame you for being upset! I worked with this age for many years.....I was the director of an infant and toddler facility at one point, I worked in other day cares, I was a nanny and I've had my own children. I can tell you, from my professional/personal experience, a toddler that bites is actually NOT common (AT ALL!!). I dealt with one "biter" in all of my years and we took it very seriously!! This involved a lot of documenting so that when he was kicked out, we had reports as to why. I'm so sorry that you and your baby had to deal with that.