Change the cage papers daily. You can use newspaper, paper towels, brown paper from paper bags, newsprint or even wax paper.
By doing daily changes, you can evaluate the droppings both in quantity and quality. They should be the same every day. If not, your bird may be having a medical problem and should be checked by your avian veterinarian.
Answered by Cathy Johnson-Delaney, DVM, Dipl. ABVP-Avian Practice, Dipl. ABVP-Exotic Companion Mammals.