As the temperature is higher, the amount of food that my dog eats is lesser.
I am trying to rewrite the above sentence into a single sentence. My draft is as follows:
The amount of food that my dog eats decreases with an increase in the temperature.
Could you advise me on my draft?
Tere is nothing wrong with your sentence
The amount of food that my dog eats decreases with an increase in the temperature.
You could make the sentence more active by saying
As the temperature rises, my dog eats less.
My dog eats less as the temperature rises.
or if you wanted to sound scientific
My dog's appetite is inversely correlated with the temperature.
this assumes that as the temperature falls, your dog will eat more.
