Ohhhhh yes, our Harry has days like that, too....my lovingly home-cooked creations sniffed at, then sneered at
then just walked away from....
What I have learnt, over the years, is that if I try to force the issue - adding more and more 'delicious toppings' - then he will actually throw up. As with us, if their little tummies are feeling a bit dodgy, I think their bodies are telling them 'not today, thank you'!
Good luck, and I hope normal eating has resumed!