Do geckos change their diet suddently?

[Sandyballs]

Hello,
I've been the proud owner of a very healthy looking leopard gecko for about a month and a half. I have no idea how old it is but i would say about 7 months. For the first few weeks i fed it crickets, then mealies, then mealies and crickets, now just large mealies. He normally ate 3-4 large mealworms every night but a few nights ago he refused to eat. the next sevral days he wouldn't eat at night and only ate 1-3 L mealworms at irregular times. Is this part of his nomal routine? He has been pooping and all. Temps are right, (maybe a lil too hot on cool side but fixing it). Also i've noticed that when i enter the room at night he tries to climb the glass.

 

[Mel&Keith]

Sometimes they can decide that they like one food item better than the other for a while. As long as he's eating worms or crickets, pooping regularly, and not losing weight then you probably don't have anything to worry about. Climbing the glass doesn't mean anything, just a reptile thing. They love trying to escape even if the effort is futile.