Hey all,I have a sick silkie hen. After research I've decided to try tylan 50 injectible. My poor silkie is so thin she has no breast muscle to inject. I read some people use the back of the neck. Will this still be effective? Also I have to use a diabetic needle. How do I figure out dosage in units? If anyone knows it would be much appreciated. This is our last ditch effort to save her.. Tried everything else..