My first shot left a black mark on GUido, which eventually faded away. The rest of them went much better. I don't know if this will help, but this is how I do it: Hold cham firmly in left hand (I am right handed), with its head away from me. Place needle against skin, just below that little concave area just below the backbone, with the beveled part of the needle point facing outward (that way the fluid fills the loose gap between skin rather than pressing against other tissue). Needle is resting against cham's body. Slide the point between 2 scales, and inject (this is the part that makes it go smoothly- getting it between 2 scales). Our one vet said you do this into the upper half of the body (from midsection to head). You don't inject into the lower half of the body (from midsection to tail) because the med could go directly to the kidneys then.
I am assuming this is subcutaneous, not intramuscular?