I ordered these for my ducklings, and im having difficulty getting them to dissolve.. i can only get about half the tablet to dissolve in water. i mixed it with some brewers yeast and i have about 100-120mg in a gallon of water. I make sure i shake it thoroughly before giving it to them, but theres still a little residue on the bottom now and then.. any fixes i can try? I cant find ANY place to order gel capsules online.. and i havent found them in any pharmacy near me. :/ any advice for any of this?