Thanks Hyacinth. I've started the telling off for the chewing/nipping thing and I gauge he is slowly catching on. He has improved anyway. I do sense that he tests how much he can get away with as well, before he spends ten minutes or so in timeout. I put him on the balcony, which he sees inside and often cries to come in. After ten minutes I let him in and he is happy as larry. I'm just hoping that if he does something quite disobedient, he learns he will be put in timeout. However, this may be also teaching him that if he cries, he will get let in. Anyway, with any training I guess, it all takes.