I wasn't able to locate any selenium when I went out last. I'll call around today and see if I can get any. I should be able to get ahold of some vitamin B liquid pills.
Please look for the COMBO vitE and selenium... there is also a type of selenium from selenate or selenite which to my knowledge is not used in the combo tabs ... that selenium is from a different base and that is what you want (and NOT the selenite or selenate form which is poorly absorbed by birds)... If I remember correctly the combo tabs are around five dollars and there are several online sources (though of course you do not want to wait... the price can vary widely so calling around is a good idea)