Thank you again!.He is quite a big boy,I think he weighs about 35 K.He has always had a good appetite,and he is solid muscle,as he runs off lead every day for about an hour,so he is quite fit.Trouble is ,I'm only small myself,and he has pulled me over 3 times to date(Always in a wet muddy field)!!.Last week I invested in a really good pair of walking boots,so this winter will be more prepared.Also bought him a 3 peaks all terrain harness/ back pack,to see if it will calm him down but haven't tried it in him yet!!