I am also curing my BP calico male for RI.

The doctor suggested me to:


1 Inject the first third of the body. (from the head)
2 Insert needle through scales
3 At an angle of 45 deg.
4 Massage the area to let the muscle absorb meds.

Dont be afraid if you feel that the needle wont go in, their skin is very though.
It was the first time for me too, and Its normal you are scared a little..I was a little freaked out too.

Good luck

Luca