Yes our Jazmin is the same.
So we give her ten minutes to eat it, if she walks away, I put a teatowel over it.( to keep the rotten flies off)
If she wants it later she barks at it.

With the weather being hot, she will nibble through out the day.
Then come the evening she will eat her main meal.

As long as you dog is drinking, I wouldn't worry.
In the really hot weather, we always play with her pool and hose pipe.
Then I know she is cool.

Mazz