Candle the last egg before you toss it. It could be a day or two behind the others. You can finish it with a heat lamp if you have to.
I like to confine the new babies to a rather small area for the first week until they get stronger and know that they can find mom when they get too cold.
You can soften the pellets with water. If you have a coffee grinder, food mill, blender... pulse the feed a little bit as it will be fine. I start my goslings on chick feed, in crumble form, for about a month then switch over to an all flock feed to simply feeding as this is when they usually...
Some ganders are better mommas than the real mommas. Be extra careful to not excite the goose. Her big feet easily squash tender hatchlings. Not uncommon to find one flat at the bottom of the nest when she takes the rest on their first outing.
Goslings will eat chick feed readily. If you...
I'll make an assumption that you do have a gander. If not, she is only sitting on duds. Adding a gander does not guarantee fertility as they do typically loose it as they age and from injury.
Her behavior is 100% spot on. She has to be protective for the survival of the goslings. Leave...