I just went through & am still a little bit-a hormonal male bird who turned into a little monster almost overnight. I did take him to the vet & he needed some milk thistle/dandelion lactulose solution because his liver values were a bit off, but other than that it was a major hormonal issue. This is what I did per my avian vet & it really worked well. Eliminate all high fat (limit nuts to one small piece a day, & limit seed), NO TABLE SCRAPS, eliminate all high sugar foods (sugary fruits, corn), & excess carbs (all potatoes, corn-again, pastas, beans) & all estrogenic foods from his diet (estrogenic foods are beans, green beans, cauliflower, soy-you can google what veggies, etc. are high estrogenic foods) from his diet. Super important-reduce the amount of daylight he gets a day & make sure he gets 12hrs. MIN. of dark/sleep time. 13-14hrs. is actually better. If he behaves too crazy when he's out (dive bomb flying you, flying at your face, attacking other pets, flying erratically where he can crash & injure himself), put him back in the cage. You may have to do this for a few days (I had to w/mine-like 3-4 days) before he mellowed out. Don't put paper on the bottom of the cage where he can try to rip it up for nesting (if he's doing that), put it under the bottom grate instead. Don't let him have sleep huts in the cage or any nest box type things. Block off the bottom of your fridge so he can't get under there. Put some cardboard, wood planks, something. That's super dangerous to let him get under there-he can electrocute himself on a wire. Get his wings trimmed so he can't go crazy w/the flying. I found that the diet adjustment during this time & especially the reduction of light hrs. started switching off his hormones in about 4 days & it made a huge difference. Mine went hormonally nuts after I was having to get him up a couple hrs. earlier than usual due to landscapers doing work. Just a couple hrs. more light can really get their hormones raging it seems. Try all that & in a couple weeks if he hasn't improved, you can get an anti-hormone shot at an avian vet. I believe they work for 3-6months & this is used if all other attempts fail. I haven't had to go that far yet, but he is still plucking some thigh feathers-which started when he went apesh*t. Fact I learned from the vet: male birds testicles are located on either side of their ureters. When they get hormonal, they can swell, which can start pinching off the ureters, causing them to start drinking tons of water & thus giving them polyuria (super watery poops). It can also cause plucking of the legs or lower back, because it's irritating them. This happened to my guy. Once his hormones went down, the swelling went down & he drinks normal amounts now. I had no idea about this. You can't visually see the testicles are swollen. It's a good thing to be aware of though. Good luck!