New question from my hubby. 
Hubby would like to build a double size outdoor pen and combine our 4 nine week old ducks with our 4 six week old ducks. Do you think this is a good idea? What is the best way to introduce the two sets of ducks?

Hubby would like to build a double size outdoor pen and combine our 4 nine week old ducks with our 4 six week old ducks. Do you think this is a good idea? What is the best way to introduce the two sets of ducks?