BLUE TONGUE SKINKS

Hi, I have an eastern blue tongue about 8 months old named Luna and over the last month she has hardly eaten anything. I have observed her drinking but there is a lack of defecation. I'd assume she's brumating or maybe just because of the sudden cool to hot temperature change but just to make sure this is okay behaviour I thought I'd ask. For some reason she has only gotten more active climbing the terrain in the enclosure and glass surfing and the most recent thing she ate was a blueberry but she refuses to eat anything more than that. Her basking area is 38C measured on slate with an ambient temp of 28C and a 4ft 10% uvb 3ft above the basking area in a 6ft enclosure with 60% humidity. So just wondering if this is something I should worry about since she usually eats a lot on her diet of veggies dog food and fruits. Another question I have is why she likes climbing so much because she will just climb up 2ft then jump down then climb up again she does this at least 5 times a day.