How to fatten up a crested gecko?

[iJessie]

I have rescued four crested geckos, 3 males 1 female.
I received them all looking smaller then they should.
The one female's ribs were showing.
I was just wondering how to fatten them up, something that wouldnt fatten them up to fast, don't want to shock their system!
Help please!

 

[big tom]

Get them all hydrated. This is usually the initial problem that should be addressed and it is simple to do. You will have to see what their feeding response is like. At first, give them what they respond to, be it CGD or crickets. If they don't really respond, you may want to try hand feeding CGD to get them going. The fact that they are in a new cages, may cause them to be less responsive for about a week. If they eat crickets... gut load them and feed them to the geckos daily, until the geckos put back on the weight. I will just mention... house them all separate, if you haven't already. There is no need to put any more stress on them until they get their health back up.
If they still won't eat, try mashed banana mixed in the CGD with a little calcium mixed in... just to get them going. Using the CGD will help you transition back to straight CGD quickly.
Good luck... hope this helps.