We have had an Missouri residence posting on a English forum about her 30 farm cats some of which are altered but some are not.

Any advice or links for TNR help in this area.

I have already posted the following links...

Here are some local rescues which help alter ferals in your state.
http://www.lovethatcat.com/spayneuter.html#mo
http://www.operationnoblefoster.org/...sources.htm#mo

TNR Programmes (Trap Neuter and release)
http://www.phhafoundation.org/links.html

Thanks