I live in BC and while most of the city can't keep chickens the area where I live can so there aren't really any chicken experts nearby that I can ask for advice. I only have 2 laying hens that are 9 months old and I think one of them has worms. She has lost weight and her comb and wattles are very pale and small. I have checked for external parasites but I haven't seen any. I have been reading through all the worm threads and I see that many people recommend starting with wazine and then using a broad spectrum wormer a week later. If I go to a feed store what should I be looking for?