Don't dare give this. It might sound harsh, but I think it's too small for a medium-sized dog. I also bought a medium coffee wood chew and that one was at least three times bigger.
I bought this dried cheese bar thinking my Husky (30 kg) would love it, but this bar is so hard—and I really mean hard—that he couldn't even gnaw off the tiniest piece and just gave up. I tried heating it in boiling water and even grating it, but that didn't work either. I wouldn't recommend this product.