Is it safe for ducks to drill in sand?

[morrowmoriah]

I'm thinking about adding sand instead of straw into my duck's run they stay in at night. What are the pro and cons of using sand? Is it safe for my ducks to drill in the sand? I don't want it to cause health problems if they accidentally ingest the sand... Thanks ahead of time!

 

[chickens really]

I use gravel......like pebbles.......my pen is sloped so all the water runs out and I clean with a hose....In winter it is straw.......


Cheers!