Do sleeping fox catches no poultry?

This is a play on the proverb "The early bird catches the worm". It implies that if you're not proactive and take advantage of opportunities, you'll miss out.

In this case, the fox is meant to represent someone who isn't taking action. The "poultry" symbolizes the desired outcome or reward. So, the saying means that if you're lazy and don't put in the effort, you won't succeed.