My 5 year old quaker parrot, Nyx, has very suddenly become much sleepier then usual. He spends most of the day just sitting on my knee and grinding his beak. He doesn't seem unhappy, but it's not at all how he was before. I've taken him to the vet several times with multiple blood tests, a fecal test, and viral + chlamydia, but everything came back normal, with the only thing being that his white blood cell count was higher. He's been on and off antibiotics (Baytril), and it doesn't seem to be doing anything. He spent the summer with two diamond doves, one of which got sick herself but with much different symptoms, to which antibiotics didn't seem to work. This inactivity comes in waves, with some days being better then others, and I cannot for the life of me figure out what causes better days then others. Very recently, his poops have gotten watery as well. I'm confused and running out of things to do to help. Has anyone heard of anything like this before, and is there anything else I can do to try to figure out what's going on? Thank you.