He had a bit of a temperature and a bunged-up nose so the vet diagnosed a cold.
'Do dogs get colds?'
It's most likely just a cold - or dog flu as George likes to call it - and he will recover in a few days and in the meantime he has pain-killers and antibiotics.
'See? I told you I was ill,' he muttered under his breath as he stretched out on his bed and sighed pathetically.