YAAAAY! I finally found a vet who properly knows chickens.After a very stressful week of monitoring my sick alpha hen, and three vet visits in one week (and $800 later), my chook has been finally diagnosed with a giardia parasite infection. I'm a bit peeved off to be honest, because the other vet earlier in the week did a poop test and told me he didn't see anything and she was just low in calcium is all, and today, a different vet in the same clinic said the tests clearly show the parasite and there was blood in her poop and she was low in everything, not just calcium (they did blood tests). So, thankfully, she's now properly diagnosed, the vet gave me clear instructions and a demonstration how to force the antibiotic tablets down her throat (looks really awful... but needs to be done) so finally, my beautiful chick chick will be on the mend now. I'm so relieved I finally know what's wrong and how to treat her. I lost a very loved chicken to egg peritonitis in November so I honestly thought this is what was happening again. So, brings me to the question of... how the hell did she get giardiasis, and why aren't my other two chooks showing any signs or symptoms? And why the hell didn't vet # 2 pick it up on the poop test? I clear our their waterers regularly with fresh water, even wash them out with hot water and dish washing liquid. The vet recons infected sparrows may be pooping in their water??? How do I prevent this?