hi hilary, have you recently put your heating on? not really sure as to why he is moulting as mine do it 365, lol, so don't know if this is norm. as for the chewing has this got worse? is it when you are out? please don't give up on him, things will get better with the right advice and training. my two have destroyed my garden and so i will just wait until they grow out of it, if ever someone with more help will be along soon im sure.