Warming the heart and the dinner

I know I prefer warm food, but what about dogs? Why do we mostly serve their dinners cold?
What's the best food warmed and does it really make a difference to their enjoyment like it does to us?
I've taken to warming up my dogs tinned food as I had often put half a can back in the fridge and it felt terrible giving him something really very chilly. He seems to appreciate the warm version and I can't help but notice the smell is stronger.
Why does the aroma increase when you heat food? Sounds like a silly question, there's obviously a massive difference between the smell of uncooked bacon and cooked - but why does it make us more hungry when we smell cooked food?
As dogs' noses are so very much more advanced than ours surely smell is even more significant to them and must increase their enjoyment and anticipation.
Or am I just anthropomorphising my dog too much by choosing to 'cook' his tea each night with the rest of the family!
Either way I'm not stopping, he appreciates my cooking a lot more than the humans!
Yvonne Reynolds, Manchester