When Bubble had Baytril recently, we followed it (in a separate syringe) with a teeny tiny amount of neat (Innocent) apple juice. Our vet had suggested this, or Ribena to help being it is so bitter. We weren't keen on the idea of Ribena, and so went with the apple juice, but any yummy treat afterwards would also do. Squeak thought he was missing out on something, and was begging and running around, whilst we were giving Bubble his medicine and juice, so of course had to try a very tiny bit of apple juice too!