NOTE: Not a bug, but not really a request at the same time.
I don't know how to make a Pull Request on the Help page, but this is just a documentation type thing.
Not many people are able to find any information on this simple subject:
How to Spawn a Chicken with Desired Stats (1.10.2)

The one provided on the page fails and does not spawn the type I want.
The command to do so is as follows:

give @p hatchery:hatcheryegg 1 0 {storedEntity:{Growth:10,id:"chickens.ChickensChicken",Type:100,Gain:10,Strength:10}}

This seems to spawn one just fine, I checked that each piece of code from this comment on Reddit was working and I could shave off pieces until that tiny piece of code remained.

Still requires a command block, however.

Could you add this to the documentation so others will be able to use the command correctly?
I had trouble with this a couple months ago and I'm back, with a couple more brain cells to use against this.

Thanks!