There is an insert spoiler icon in the toolbar... Click on it, then insert you photo below it, copy photo, paste into spoiler window then delete photo below spoiler. Or just post the picture, lol.
-Kathy
In case I wasn't clear, if you have blackhead, this is an emergency. I'm not saying that you do have blackhead, just that based on my experience you don't have much time to get control of it. If you can, take him to a vet, they could give you a prescription for the metronidazole that you could...
That chicken was well under half her ideal weight which means death for most birds, but I just thought it would give you an idea of what a thin bird or a full crop would look like. If you can, figure out a way to weigh him and then weigh him daily to monitor his progress or decline. If you...
You asked about picking them up to feel the crop and weight... Here is a plucked dead chicken that shows what to look for. These pictures show a very thin chicken with food in her crop.
-Kathy
These poop pictures are from a peachick that didn't survive and the necropsy showed that he died from blackhead and that he had a secondary e.Coli infection.
These pictures are from several different peachick that surived blackhead with treatment of metronidazole...
The effective dose of Valbazen is no less than .2ml per kg (2.2 pounds) so one ml is enough to treat an 11 pound bird (5kg) The average male weighs 4-6kg, so the dose would be .8ml-1.2ml.
The yellow poop could mean that your boy has blackhead, that you will need to treat with metronidazole...