Spike - 358? Really?

So on his 3 month old birthday (Nov. 1st), he was 365g. And on the next day (Nov. 2nd), he was 368g. I took a day off (Nov. 3rd) weighting him, now he is 358g?!
I admit I am a little bit paranoid. When he is gaining weight, I am afraid he's obese; now that he's lost weight (10g in 2 days?), I am afraid that he's sick. Well, so far he still appear healthy to me, kinda. I hope he's just running on the wheel more (or maybe I subconsciously gave him less food?)

I hope you remain healthy, no matter how heavy you are. Spiky.