Birds are winged creatures, and must be able to propel their weight in flight. In order to do this, they must be as light as possible, so it is natural that they would relieve themselves frequently. In some birds it may be as often as every 15-20 minutes. Potty training is fairly simple, but again it requires patience. Some birds potty train themselves. My sun conure is self potty trained, and even poops on command when I hold her/him over a wastebasket.
To potty train your Quaker, you must first designate a “poop place”. This may be in the cage, on a newspaper, or over a wastebasket. Personally I prefer a wastebasket, because I can take my birds visiting with me without having to worry about them pooping on someone’s furniture, or on them!
Second, you must designate a command word to use. Try to use a word that wouldn’t ordinarily be used in normal conversation. (I had a friend whose Quaker pooped whenever someone said “CowAbunga Dude!” Unfortunately, their teen age son had also taught their African Grey the same phrase!) You will need to monitor your Quaker for a while to judge how often he poops.
When you have established this, take him out and play with him about 15 minutes before he will need to go. When it is close to that time, place him over the designated area, and give the command word.
Keep him there until he has done his deed, then lavish praise, love and kisses on him. This is reinforcing the desired behavior. Of course he may not “perform” the first few times when he is supposed to, but it wont take long for him to understand what you want him to do.
Potty training Quakers is especially useful because they are known for pooping in their water dishes, making “poop soup”. If you haven’t potty trained your Quaker yet, save yourself a lot of water changes and provide him with a water bottle. A water bottle is what I used for all my breeder birds.