Hi Chris - I am sure you will be able to buy what you are after here. Several poultry sellers drive up from the Dordogne to Les Heroilles on the 29th of each month. They sell lorry loads of regular chickens but there are also many individuals selling every bird you can imagine. I am not a chicken nut but the variety of different chickens sold as eiher fertilised eggs, young birds, at point of lay or great cockerels it quite something. There are many "fancy" or unusual types. Breeding pairs seem expensive but I guess one pays for the pure breed. As well as ducks and geese there are pigeons, fowl,peacocks,ostrich,quail etc.
The market goes on all day but the poultry section closes at 12:00 ( just like everything else in France) and does not open after lunch. I think the market at Les Heroilles can be found on the www and is a left turn at La Souterraine up the A20 from you.
Trust me you will love it and the local lunch and wine sold from rustic cafes is great. Oh - take cash as the village has no banks. You can buy anything for the smallholding or kitchen ( clothes etc too). Take a trailer if you are after pigs,sheep,goats,donkeys,Shetlands or horses.
good luck with the move.