Don't know if he's sick or about to brumate

[Nuka042]

So last week I've noticed he's started to reject crickets slowly, he would eat about one or two then ignore the rest. However he would happily eat all of his veggies and eat his worms. So at first I thought it was just his way of telling me he no longer wants crickets. This week, his appetite has progressively started to decrease and I would notice, wanting less veggies than usual and even less worms. He's pooping regularly, however with the decrease in food he's been getting, the size of his poop has gone down...however today's poop was HUGE, like about the size of two-three poops. Other than size difference, consistency and odor-wise has been the same. I've already scheduled an appointed for tomorrow for him to see a reptile specialist however I wanted to know opinions if this is a sign of brumation or him being sick. The only thing that's changed within the last two weeks is that prior to his appetite changing he's tried horn worms.

Current temps:
Hot side: 105-110
Cool side: 80-85
Night time temps: 75-80
Humidity: 25-30%

Times:
Pre-daylight: 0800-2200
Daylight: 0700-1900

Meal times:
1st meal: 1.5 hours after waking, veggies: mustard and collard greens
2nd meal: 1200-1400 (depends on which day due to school/work), veggies: mustard and collard, protein: crickets and worms (meal worms/wax worms)-~40
3rd meal: 1700-1900: veggies: mustard and collards

Poop times: late evenings during his bath

Last weight/length check: 11/6/2011- 629 grams and 20 inches

Age: 8 months