I also give my ducks every chance at life.  I'd love to be your neighbor as well.
Have you tried giving capsules/tablets orally?  Even without tomatoes I find it easier/faster.  I trim my index fingernail very short, open her mouth, and slide the medication down the side of her mouth and into her throat.  I've even had a compounding pharmacy make capsules for me for a medication that only came in liquid because I find it so much easier.  You do have to put your finger down into the ducks throat a little, but I just remind myself that they eat slugs bigger than my thumb for fun.  I take a breath, do it, and it is over.