Probably worrying too much, but...

[EasternBlackNeckedGarter]

Mort, my garter, hasn't ever been tamed- he's very skittish and won't let you touch him. Recently, he's only been inside his cave (as far as I can tell, I only check on him once daily) and hasn't moved much. I got him to stir when I touched him, but he didn't come bolting out like I'd expect him to. His last meal was two fuzzies, 4-6 days ago. He didn't eat the two I put in last night. Could he just still be digesting the original mice, or could something be wrong with his terrarium? He has a 2' by 4' by 2' glass tank with a lid made of chicken wire (no sharp edges exposed), several fake plants, two caves, one under an inch of bedding (I use about 4 inches of a paper based substrate) no heat pad or lamp, a branch, and a porcelain water bowl. Note, I live in Texas and its been in the triple digits for maybe 10 days straight now.