I once had to give a rat an antibiotic that was a sweet syrupy thing intended for children, which my vet assured me was liked by rats as well, yet the rat in question refused its artificial taste even mixed into jam, which I thought must be similar and delude the artificial flavor. He fought that one more than the bitter Baytril, absolutely hated it. Just for kicks I tried how minute the taste could be, and even a drop in a teaspoon of tasty strawberry jam was grounds for refusal. No way I could have diluted it enough to trick him through food in any efficient way.