Bearded dragon and leopard gecko questions.?

First, please do not even consider putting your gecko with your dragon even with a wall separating them (I have a 15 yr old gecko and 2 adult 2.5 yr old dragons) Secondly, it sounds like your dragon might be stressed, which affects appetite. Stress can occur from a variety of things, even a new 'home', also common is too hot/cold (be sure your dragon has a 'shady' spot to cool off if needed) over-handling, not keeping the light schedule consistent, too much noise close to the cage, etc. What did the previous owner feed her? There are several good books, I recommend: 'The Bearded Dragon Manual' avail. at www.avsbooks.com. If any of the advice you are getting is not helping, contact a vet to rule out parasites or bowel obstruction. Here is what I feed my super healthy dragons (raised from eggs..) 1/3 each: greens, crickets, pellets. Also clean water 1-2 x day. "Zoomed" brand pellets (@ 2 Tb daily - I have never 'added water' as it just gets mushy, a texture no dragons in my experience like. Make sure whatever you buy, it is natural (has no artificial anything) and has appropriate added minerals (iodine) and calcium. For the greens, I chop romaine lettuce, turnip or mustard greens and add small amount of either melon (no seeds!) apple or strawberries (bananas are good, my Lizzies just don't like them) A few cups kept in a Tupperware in the frig is good for 3-4 days - always feed only fresh everything. Every other day, I toss a handful of large crickets in, lightly dusted with a calcium/vitamin made for dragons.