T.T.
It seems harsh to me that they would take a comfort toy away from a child. I do not understand that. My son is in a kinder-rediness class w/ 4 & 5 year olds and several of them take comfort toys to school with them. They can only take them out at certain times, but still, I think it's cruel to separate a child from such a thing.
Honestly, I think they should deal, since they knew from the get go that this was an issue. Sometimes you have to be your child's advocate, I know from experience it's not easy, but stick to your guns so your little one will let go of his bunny in his own sweet time.