Why would he have such a deficiency to begin with though? Not saying he doesn't, especially if he is showing such improvements. But it is confusing. Reptivite is made with preformed Vitamin A so with it being supplied on a regular basis it should have been building in his system and stayed steady. He shouldn't have had issues.
Sorry to have taken so long to reply to you Andee. I didn't see an alert for your post, and I've been busy the last few months. Yours is the million dollar question. I still have no idea why he would have had a deficiency (especially while supplementing with Reptivite) or more importantly why his kidneys appeared to be failing according to the blood-work.
THE GOOD NEWS IS THAT IT'S BEEN AROUND FOUR MONTHS SINCE MY LAST POST AND YODA HAS MADE A FULL RECOVERY!!! He's been off of meds for almost that entire duration as well. I still notice on occasion he seems to have a little discomfort with that same left eye, however he is not keeping it closed. He just appears to blink more from time to time. The lethargy and arm/leg dangling is completely gone! He eats and drinks regularly and is alert throughout the day! I am planning on scheduling a vet appointment next month just as a precautionary follow-up.
I haven't changed much as far as supplements, feeder variety and gutloads. I have had silkies readily available all summer along with his other feeders, although he's not a huge fan. He has also been getting sunlight in his outdoor encloser, and I let him free-range in our yard's small trees and bushes from time to time while watching him.
I have changed one thing pertaining to his care that I think has helped him more than anything. I OFFER HIM WATER TWICE DAILY BY PHYSICALLY HOLDING THE MISTER AND LETTING IT DRIP RIGHT IN FRONT OF HIM. I WILL LET A FEW DROPS TOUCH HIS NOSE AND WITHIN A MINUTE OR TWO HE DRINKS STRAIGHT FROM IT AT LEAST EVERY OTHER DAY! I still of course mist his plants and encloser two or three times a day, provide a dripper that drips onto leaves and into a tubberware, and use a BioBubble drinking fountain and change the water daily (I haven't actually seen him drink from that yet). I'm not sure why he doesn't seem to drink on his own very well, but I'm just glad that he actively drinks directly from the mister. It's more work and time for me, but as long as it's keeping him healthy, I'm happy to do it!
I want to thank everyone again for all your comments and advice! This is a great forum! I hope that other chameleon enthusiasts will be able to gain knowledge and insight on how to address a similar issue they may encounter with their chameleon from reading this. I would also offer encouragement to others. This was a tough thing to go through with my little guy, but I didn't give up and neither did he. There were many days I thought I would get up to check on him and find him dead. It just goes to show that with the right treatment it is possible for them to pull through even when it may not seem likely or possible!