It is going to depend on alot of things like the size of your run and the number of birds you have. In raising cockatiels and parakeets in outdoor aviares I learned that the more birds you put in, the faster it gets dirty.
Also in regards to your dirt, it is not going to keep a coyote or racoon...
Hey Guys,
New to the forums here, to make a long story short someone teased my son with a toy duck, so I went out and bought him four real ducks. As my wife say's, She is glad they did not tease him with a stuffed horse,lol. I have a long history with birds, having raised parakeets and...