I think that they tend to eat more when its colder. In the summer my dogs slow down on the eating...its just to hot. I think most people are like this too...more active in the summer and always on the go.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD