Hi everyone just reaching out as my 81 year old father has COPD and is in stage 3. He has had a few hospitalisations and needed oxygen/antibiotics. He has just had another flare up due to a chest infection and the nurse/doctor has said that when sitting down his oxygen level is 89 but when walking it can go down to 86/87 and that he may now need supplementary oxygen at home. Is anyone at this stage with COPD? Not sure what advice I am looking for but just wanted to hear others stories. If so is there any things he can do to ‘slow’ things or is there nothing once you get to this stage.