I've noticed over the past three days that Zim, my corn snake has gotten a little more active than normal. She's coming out and cruising around the cage even in the daytime and during the night she will climb all around the cage. Temps are as follows:

Cool Side: 75
Warm Side: 85 (a little cooler because I had moved the light for a few minutes)
Humidity on the cool side: 52%
Humidity on warm side: 36%

She was fed 7 days ago and is due for a meal but she is not normally this active before a meal. Especially not for 3 days. I am suspecting it was her meal size that might have led to this. Her previous meal was a hopper mouse but the two meals before that were small mice. Could the change in prey size be making her hungry before its time for a meal? Should I stick to hoppers (she eats these no problem, slight bulge in belly) or should I up her to a weanling or small mouse (bulge, takes her a while to eat, but no problems)