On Sat, 16 Jun 2007 11:16:53 -0400, Jim Shaffer
wrote:

I have some holiday cacti, I'm pretty sure they're Thanksgiving and
not Christmas, which are a little bigger than I'd like them to be. If
I would trim them now, would it prevent them from flowering this year?


It is a little late, they should be trimmed in the spring. Trim back
the stems a few nodes to help make the plant more symmetrical. After
trimming they would appreciate some dilute fish emulsion and morning
sun to trigger strong new growth. Make certain they are well-drained.
Your trimmed plants should flower if given proper care.