Ok, enough fun, people might get the right impression about me...LOL! Feeling a tinge of guilt only means that you're human. I routinely put a significant number of lizards to sleep every year (and I mean SIGNIFICANT), and it has reached the point where I can't look directly at them on the drive home...
I haven't had any problems with parasitic transmission using frozen-thawed, or even live lizards from desert areas that are some distance from standing bodies of water. I did run into trouble many years ago using live lizards that were obtained over a cove of one of our desert lakes. The juvenile alterna developed the same small external bumps that were present in a number of nightsnakes from this lake area, and that was not a good thing. My experience is that you will need multiple lizard species when breeding alterna from western and eastern parts of their range and in a few cases live lizards, but most of the time f/t will do the trick. "One size doesn't fit all" with these offspring.
Once, I went out with a BB gun, but I ain't like that no more. I ain't the same, Ned. My wife, she straightened me up, cleared me of drinkin' whiskey and all. Just 'cause I go' on this killing, that don't mean I'm gonna go back to bein' the way I was. I just need the money, get a good start for them youngsters. Ned, you remember that lizard I shot through the mouth and his teeth came out the back of his head? I think about him now and again. He didn't do anything to deserve to get shot, at least nothin' I could remember when I sobered up...so now I use a noose.
Robert "Munny"