Possibly sounds strange, but can your ABs come in another flavour? My Pip was on ABs last week, he absolutely loved the taste! We got the pharmacy subsitution instead of the brand name.

Another tip given to me was to give a drop to taste on the tongue, then after that's tasted, the rest of the medicine.

Else my dad used to mix it up with jam when he gave it to me!

Good luck! It's not easy with a sick bubba.