turns out I've never shot in the scruff because Catcat is so narrow there, there's not enough skin to tent up -- I'd probably be doing "clear through" fur shots there if I tried
with him, it's easier to shoot somewhere between the shoulders and the area where his flanks are a bit concave -- I shoot on one side of the backbone in AM, the other side PM, alternating forward, middle, and back if I remember where I am in the alternation .. doubt that I've ever injected in the same place repeatedly, he's usually nose-to-food-bowl and doesn't notice more than to growl slightly occasionally, if even that