Dragons

Ok, so pretty much I've noticed you can't get shards for rekker and Bob, captain sparkles, or wrot and other dragons shards seem to be in the daily resource boxes.

My captain sparkles is tier 3 because I spent $$ on it, and one of my clan mates was talking about how you need the tier up to evolve it, my next dragon pack costs like 50 bucks, and the one after that's going to be even higher.. so my question here is can their shards be added to the daily resource boxes and if they already are maybe we can do event shard rotation..

Examples

If you have 3 he grassland dragons every 3 days it'll switch out Ruby's shards for captain sparkles or vice versa just a way to upgrade dragons but still lock it behind grinding or maybe add it to the 3 star reward