Sorry about the loss of your rooster. Do you mean the actual shells of the eggs had bubbles?
I’m getting mixed advice about when to switch to layer feed since my girls aren’t actually laying yet but it should be soon. The are currently eating organic grower feed and I just offered grit in a separate container which they don’t seem interested in yet.
Yes the egg shells had weird bubbles on the shells.
Don't give your chickens egg layer feed. Give them non medicated hatch to hen feed, meat bird finisher or something like that. Look at the tag on the nutritional information on the feed bag and make sure the calcium content is around .5 min-1.5%max. Don't get medicated feed either.