So, I've been working like a dog this week. Someone raised a point, why like a dog? Ya know, I dont know!

'Working like a donkey', I understand. Those poor animals work hard. Cows work fields too in some countries. Slaves, ants, internal combustion engine, Oompa Loopma ... all I get. But when do dogs work? They truly have a good life. Even in countries where they are homeless, they don't really "work".

Or perhaps the expression is all wrong. Or may be *I* use it wrong. Perhaps I actually have been working like a donkey. Next time I am on vacation chilling out all day, I should tell people I've been 'working like a dog'.