yes - there are horse races in Frauenfeld on Sunday. Here is the link to the schedule: http://www.rennverein.ch/xml_1/inter...tion/d7/f8.cfm
(start 13.30 - but be there beforehand if you want to bet). Here is a link to all the horse races in Switzerland (click on "Renndaten" ie race dates): www.horseracing.ch
You can buy tickets at the gate, either standing tickets or seats on the "tribune".