The meter I bought came with 33g lancets. It was impossible for me to succeed without multiple pokes. I went to walmart and bought some that were 26g, if I remember right. I was able to get blood in one try almost every time with those. As far as "hurt"? I don't think they really cause as much discomfort or pain as we think they do. Try poking your fingertip with one. Yeah, you feel it, but not "ouch, that hurt!" pain. And a cat's ears have less nerve endings than the tips of our fingers.
30g is pretty small. Maybe try some 26 or 28 gauge? On a good note, once I'd done the ear pokes for a while, Bob's ears bled a lot more readily. Eventually, I was able to succeed every time with the 33g lancets that I saved. Your technique will also improve over time. Last week, I tested Bob for the 1st time in a full year to mark his 2 year's off the juice anniversary. With a 33g lancet, I got blood on the first try. And Bob didn't fuss at all.