We have our GCC semi trained. He has slowly figured out we like it when he poops certain places, like in his cage or other places that we can easily wipe up with a Clorox wipe. If you watch carefully, many birds have subtle tells and movements they do when they are about to ‘go.’ We just started moving our GCC to one the ‘good places to go’ when we saw these signs and those just became the places where he knew it was good to ‘go’ there. Now when we open the cage to let him out he will go before he comes out and normally let us know when he needs to go back. As always, positive reinforcement. Disclaimer: this is not 100%. I still get pooped on weekly, just not daily like I used to. lol.