Not great. I searched for halloumi as it was mentioned on the page and got "no information found".

Honestly, I have no idea why there are so many things dogs apparently can't eat. It's amazing they survived this long and they're not extinct. I suspect much of it is complete rubbish. For instance, I've made halloumi. It was just milk and rennet. About the simplest cheese there is - and apparently they can eat cheese.