CCCS is not a Government service - it is a registered charity. So whilst it may have Government patronage, the Government doesn't have figures they pluck out of the air that one is 'allowed' to offset against income when trying to assess how much you can pay your creditors.
The purpose of the CCCS service is to provide counselling services to people in debt so the organisation and the individual can work out a plan of what might be, or might not be possible.
Why not suggest to your friend that he/she phones for a session.
PS, when one is seriously in debt, I've always regarded pets as a source of sustainance, not an expense. That's what happens in most parts of the world.