Temps. are OK and crushed walnut is a major no-no as the last poster stated. Change to washed, sifted children's play sand, non-stick shelf liner (Duck brand from Wal-mart is good), tile, reptile carpet, newspaper, or paper towels.
Greens wise. Spinach is bad as well as peas. Lettuce and spring mix don't have enough nutrients. My recommendation is Mustard Greens and dandelion. He's a good link with more info.
http://www.beautifuldragons.503xtreme.com/Nutrition.html
I would not heat the enclosure at all at night unless your house drops below 60. Reptiles need to cool and slow their metabolism at night.
I don't know what size a 45 gal. is but an adult should be housed in an enclosure that is 4' x 2' floor space so yours is likely too small. You really should post a picture.
Put the lights on timers. Consistent day/night is important. You didn't mention supplementation?
Overall, is see some positive changes could be made but no dramatic husbandry issues.
At 1 lb. 2 oz. you dragon is 545 grams. Not bad for his length. I like mine a little heftier but every dragon is different.
Force feeding is tube feeding (animal has no choice but to take food into his stomach hence "force"
. Assist feeding is when you put food in his mouth he chews and swallows on his own. This could be syringe or whole food (he could spit it out). My feeling is you are assist feeding.
I have been assist feeding a dragon here for over a year, his name is Brutus. Why, because he can't eat on his own and because of his handicaps will never be self sufficient. I manage his intake using a weight scale. If you control his intake then you have to have a plan to keep him from being hungry and also not let him get fat.
My recommendation is to buy a weight scale that weighs in at least one gram increments and then stop feeding him. Parasites should never have been a reason to start assist feeding. Animals are funny and get used to being treated in a certain way. He has likely accepted that this is the way he eats now.
Don't worry if he eats daily at all. One of my females woke up on Sunday. She slept without eating or pooping for 5 months and 14 days. Brutus is lucky if he poops every 2-3 weeks this time of year.
The bottom line is that if he's not hungry he won't eat. You need to let him get hungry. I still have a couple dragons down for the winter. Maybe he's just lethargic because this is the season for him to be so. Buy some superworms (petsmart sells them, you have to ask they are not refrigerated) and offer them when he hasn't eaten for a few days. Just keep him hydrated. Drop water on his nose and see if he licks it, if so, continue till he stops.
544 for a 21" dragon is good. I wouldn't worry at all until he loses more than 10%. I took in a 20"ish dragon 9/1/08 that was only 269. 4 1/2 months later he's almost 450.
If you want you can back channel me and I will give you my phone number. Just click on my handle in the posting.
Click on the photos tab, log in and upload your photos in the gallery. Then when you post here in the forums your photos will be in a box below the box you type your post in. Click on the one you want and it will be with the text.
The pic. below is Brutus. His spine is fused and always has that curve. He has no use of his back legs. He's a rescue I've had for 1 1/2 years, I have no idea how old he is and never thought he'd be with me anywhere near this long. He's a trooper and may outlive me. lol.
