Autumn is fat for sure, harvest festivals and all that, Summer is slim due to beach bodies, and Winter I suppose could go either way depending on food availability. But Spring, I honestly don't know.
summer -> being slender
autumn -> gaining
winter -> being hefty
spring -> shedding
yeah that seems about right for my cat
So what you're saying is you need to constantly eat more and more.
That about sums it up, yes! Don't forget to drink water and other delicious drinks!