I'd consult with a compounding pharmacy.
Compounding pharmacies have lots of experience turning pills into liquids and come stocked with a variety of flavors. Roast chicken and turkey have been the two favored versions with my quillkids. I tend to stay away from the strawberry or other fruits because they just anoint with it. The pharmacy will also be able to tell you if the meds will lose potency if they're mixed ahead of time (ie, if it's a bad idea for that particular medicine).
Satin Mirranda Hufflepuff -- Mommy loves you
Tex Buckaroo Hufflepuff -- What a good boy
Bella Stormrider Hufflepuff -- Welcome home sweetie
Marlee Twyla Hufflepuff -- Big little girl