long story short I have a baby Muscovy about a month old that looked like yesterday might have sour crop it was having problems standing and I was speaking with a wildlife rehab or that specializes in Muscovy ducklings. I asked her yesterday if it could be neurological because it was twisting its neck a little bit yesterday she said it probably wasn't that but today the duck got much worse can it barely stand and is twisting his neck it's very weak at this point. she also thinks it could be a toxicity thing but the birds have no access to anything that would make them toxic all the other ducks the same age are just fine. I am going to be giving it niacin, Kaytee baby parrot food, critical Care, cod liver oil all mixed together (actually not niacin but some poultry vitamins that have niacin in it) but my question is how long does a tube need to be and is there somebody that can show me how. I've two fed chickens before I'm very familiar with it so I just need to know if it's the pretty much the same process I assuming the two needs to be longer. I just need some help ASAP.