Ahh, the great worming battles...I'm sure everyone has at least a story or two about their horse spitting it out, or missing the horse's mouth, or getting slapped by their horse's swinging head as it tries to avoid the plunger. I know I do
It's really bad for me because I have to give me horse two doses. The first one, I am really sneaky and just shoot it in her mouth, but after that, she knows what I am doing and it is 'war' trying to get the second dose in her mouth.
I would say just to buy a worming bit. Then, you don't have to worry about mixing in enough or the horse not eating it or the horse spitting it..ect.