Beardie won't eat crickets and seems very lethargic

[sydcersos]

Hello! I have a bearded dragon named Stein (like Frankenstein) he is around 3-4 months old and probably 8-9 inches long. He has reptisun 10.0 bulb and a regular heat bulb in his 40 gallon tank, it is around 95 degrees.
About a week ago he stopped eating his crickets and veggies. I've been feeding him baby food squash mixed with calcium powder for the last week. Yesterday he ate 3 crickets but won't eat any today. He seems really lethargic at times and he turns a little dark. I'm just really concerned, is this normal for a beardie at this age?

^here is a picture of him!

 

[CooperDragon]

He looks OK based on that photo. He's still a little guy though so can't go too long without food. Do you see signs that he might have a shed starting up? That can cause them to lose their appetite sometimes.

I advise picking up a couple of digital thermometers like this https://www.amazon.com/dp/B0017N8W90/ (one for each side) or an IR temp gun like this https://www.amazon.com/Nubee-Temperature-Non-contact-Infrared-Thermometer/dp/B00CVHIJDK so you can get accurate readings of surface temperatures in the basking site and on the cool side. It's important to have that tuned just right. You want the basking area to be between about 100-110 and the cool side should be between about 75-80 or so with a gradient between. Having a proper temperature gradient is critical to digestion and overall health so accurate readings are important.

Do you have the T8 tube ReptiSun 10? Or is it a T5? The different models have different ranges so it's important to get the UVB light within the proper range for the version you're using as well.