I have a a HiLine chicken she's about 8 months old & she developed the sticky vent about 2 weeks back & was off the lay, looks listless etc. I lost my Penny last Christmas Day to something similar so I followed Mr Apples advice & I've wormed Pebbles & she was back on track. Eating, happy, laying again but yesterday she declined. During this time she still had a runny bottom. Should I reworm her? Would she need another dose? She's 2.4kilos & I gave her .2mls. She's very similar to Henny in the fact that she's a wee bit of a scavenger. My other 2 birds aren't & eat only what I feed them. Would this be why she's ill?