Don't know. I'm gonna ask the owner though. JUst got back from the stables. Friday the vet only had 4 days of meds with him and supposed to send me more out. Well, he didn't and I called and I was told he was out but sending something he liked better. I wasn't too happy with changing what was working but my vet said it would be ok since both sulfa. It's called Tucoprim and a PITA. It is very light and doesn't mix well. Okie wasn't crazy about it either. Tomoorow I'm gonna mix it with a little water and try to make a paste and then mix with syrup before putting it on the feed. Okie gettin spoilt. He would only eat with us holding the bucket. He's got that sparkle back in his eye too:')
I've used Tucoprim. It's good stuff. I never had any problem getting any of mine to eat it. I guess my sweetfeed had enough molasses in it to make it stick. You might try buying some cheap molasses at the grocery and mixing it with that. A couple of years ago, Tennessee came down with the heaves after I got a batch of dusty hay and I had to give him some kind of powdered antihistamine, I can't remember what it was called, but it must've tasted horrible coz he wouldn't touch it. The molasses worked for that, but I had to do like you said and mix it into a paste with the medicine and give it to him in a wormer syringe. The molasses made it stick to his tongue too.