I'm not sure exactly when they are 'teens'. I do remember doing a pic of Jasper one day when he had been being 'grumpy'. My sweet little baby suddenly didn't want anything to do with me. Just wanted to be left alone and got a little nasty about it (very bitey). This was around end of September I believe and he would have been around 5 months old. Anyway, here is the picture that I did grin