Oh the joys of doxy. I had the pleasure of treating an entire barn of horses at the same time of that stuff. And of course NONE of them ate it.
This is what I had to do.
Buy a coffee grinder to crush the pills (make sure you let it settle before opening the top!) Then dump the crushed pills in a mug, mix with water and a little bit of molasses. Put it in a dosage syringe and shove it down their throat. Unless you check the floor everytime after they eat for pills, it's really the only wait to get them to eat it all.