I don't have goslings, but I've raised three ducklings. They were a day old when we first got them.
They weren't interested in the chick starter until I made it soggy and put a bit on my finger and poked it at them. Once they all started eating it off my finger, (maybe it looked like a mama duck's bill?) I lead them with my finger to the food and they finally started eating it. They wouldn't eat the dry food for about a week, only wet.
They also loved bits of greens in their water every day, and chopped up tiny bits of bologna or hot dog, too, though that was only once a week or less.
Maybe these things would work for your gosling. Good luck! We're hoping to get goslings this year. We love our birds!
We started our goslings on 18% chick starter crumbles, and after 4 weeks, switched them to 15% grower crumbles.
I understand you wanting to get the little guy eating, and looking for something appealing to him to stimulate the appetite, but I would still make starter crumbles available to him, and try to transition him to a balanced diet as soon as you can.
Quote:Really! Mine wouldn't touch onions of any kind. After two years of grazing my lawn the only 'weeds' left were wild onions or wild garlic. I tried to interest my geese in them but they would not touch them.
I found that mine liked a mixture of unsweetened apple sauce and unmedicated starter crumbles for the first few days. Water mixed with the starter would work as well to make a soupy mix. Just don't let it sit out too long to rot. I changed mine 3x a day.