You can try a slurry. Here is a recipe that a rescuer gave me just in case.
OH! And pedialite can help TONS for an appetite boost. Also, the leopard gecko slurry may help as well:
"In a blender, combine:
1 small can Hill's A/D pet food (available at most vets)
¼ cup Ensure (not chocolate)
1 jar baby food squash or pumpkin
¼ cup Pedialite
*2 tabs or contents of 2 capsules milk thistle (herbal supplement, liver purifier, found at most drug stores).
*2 tabs or contents of 2 capsules of Acidophilus (GI system probiotic, found at most drug stores).
1 tsp. calcium powder w/Vitamin D3
1/2 tsp. herp vitamin powder
2-4 X-large handful of mealworms, added slowly while mixture is blending until it is about the consistency of a milkshake.
*optional ingredients
Puree all ingredients until completely smooth. Pour into ice cube tray(s) and freeze. Store cubes in zip-lock bag in the freezer until ready to use, then thaw out 1 cube at a time and store in fridge for 2-3 days. You can use the empty baby food jar for this purpose, washing it thoroughly after each use.
Using this mixture, draw a full 1ml dropper (eye dropper type) and place a drop on the gecko's nose, being careful not to plug the nostrils. Be patient and do not force-feed! The gecko will lick it of its nose, and as it does, slowly squeeze out a little at a time. Most geckos love this food, and will lap it up. "
Replace the meal worms with roaches though.
Try this and see if it helps. Also give a
bath that helps to stimulate appetites.
Hope this helps out !
Janie.