I have a similar problem to the one just posted except my leopard gecko that it isn't eating is full grown. She is about 5 or more years and her eating habits have been getting worse lately. She has always had problems eating, I have almost always had to feed her by hand except when I put crickets in the cage. But last week I put crickets in and she didn't eat a single one. And when I tried feeding her meal worms by hand she only ate one and then was not interested. She is getting really skinny and I'm starting to get worried. I have another leopard gecko from the same clutch as her and the other one eats great, in fact she's pretty fat. So I'm not really sure what to do anymore. Any suggestions?
First i have a couple of questions for you...
1. you say your leo has always had trouble eating, has she ever been to the vet to have this evaluated? if so, what did the vet find/say?
2. You say you have another leo from the same clutch, are they housed seperately or together? If they are housed together seperate them immediately, the other leo may be causing her stress, and if she has parasites the other leo is at high risk for developing them also.
3. what is her enclosure like? How big is it? How is it heated? How hot is it on the warm side? How hot on the cool side? What substrate are you using? (some substrates are notorious for causing impactions, which can lead to anorexia and weight loss)
The first and most important thing i would suggest is to get her to the vet, or at least bring a fecal in. It will save you time to just bring her into the vet for an exam when you bring the fecal because if the fecal is positive for parasites the vet will need to see her for deworming, and if it is negative he will need to see her to figure out whats wrong. If she is losing weight then you really do not have much time to lose. IT worries me that you are noticing weight loss after only a week, most leo's have good enough fat reserves to go a week or more without food and not lose any weight...
I would check all your husbandry, make sure the temps are correct (85-90degrees on the hot side) etc...and fix anything that may need fixing, or leave it alone if they are all correct.
have there been any changes to your leo's life lately that could have upset her? Did you move her tank? Or rearrange it? Think very hard to see if there is anything, even something little that has changed. SOme leo's are more sensitive than others and can be upset by small changes.
Whenever a lizard stops eating, if the immediate cause cannot be determined (low temps, stress etc) then it is time to go to the vet. Where you said your girl is losing weight already i would get her to the vet asap. Please do not delay.
I hope this helps a little.
good luck!
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0.1 Bearded dragon
0.1 mexican kingsnake
1.0.2 Leopard Gecko's
0.0.1 Rose Hair Tarantula
1.0 BTS
0.0.1 Reverse Okeetee Corn
0.1 Bullmastiff
4.1 Cats