The shop at Kildean closed totally as United Auctions didn't want them to move to the new market outside Stirling.
There are loads of local places, Central Saddlery
http://www.centralsaddlery.co.uk/contact/ at Standburn on the A803 sells chicken food, both pellets, mixed grain and layers mash, shavings etc as well as horse/goat food. Also Russells country store supplies has a place outside Linlithgow Tel: 01506 652830, Wester Woodside Farm, Linlithgow, EH49 6QE, and its main shop in Larbert, Falkirk.
Caledonian market just at Springkerse in Stirling has a feed stockist inside in as well- noticed it at the rare breed sale last week.
Hope that helps too.
Beth