A couple of my ball pythons have a respiratory infection. I went to the vet and I have to inject pipracillin intramuscularly. The vet showed me how to do it, but I feel like I'm doing it wrong as there's always a pretty substantial bump afterward, like it's going under the skin and not into the muscle. I've tried looking for videos and it appears that they're all made by kids in their bedrooms.
Does anybody know about how deep their muscles go? Would it be dangerous to go in a quarter inch under an adult female's skin? Are there any videos on this made by someone with experience, like a breeder or a vet?