Simply put, I'd like for it to be against lioden ToS to advertise your king as mutated.
I am NOT saying you can't be proud of getting a mutated stud, I'm NOT saying you can no longer show it off through your king's name or your username.

Why?
1-Because it adds to the spread of misinformation.
2-Because it has been actively used for scamming.
3-Because it adds nothing to breeding which is what stud adverts are for.
4-Because it helps moderators crack down on points 1 and 2, which are currently against the ToS.


Explanation
1- I've messaged numerous players who advertised looking for a mutated stud, to make sure they knew it didn't affect their cub's mutation chances, and gotten many thankful messages saying they'd been misled, or wasted money on mutated studs because they were under the impression it helped somehow.
2-With the addition of lion balls, many new players think that mutations such as dwarfism pass naturally and when they see people capslocking the word 'MUTATION' in their stud adverts it adds to the misinformation.
3-You cannot sell your king, only his breeding potential, and because no mutation chances (to my knowledge) come from the male it's not a suitable thing to put in sales chat.
4-If it isn't 'borderline scamming because it's technically true' and is instead an enforceable rule, moderators will be able to help protect the community from points 1 and 2.

EDIT 2: There's a potential item for males to pass their mutation, so I came up with other options. The original is still up there because there is only 1 male-exclusive mutation and there are half the kingable male mutations that females have available (so far).
I do feel like this is going to cause even more rumors on what does/doesn't pass, as with lion scrotums, but the alternatives are-

A) All mutated males need a disclaimer somewhere on their page that their mutation will not pass without the use of the new item. This can be done as an automatic thing coded by staff to show at the top of their page, or be an enforceable rule like the original idea.

B) Have the information on what mutations pass naturally and which items there are available under the breeding section of the FAQ where everybody can see it. Or add "telling players mutated males can naturally make mutant offspring" as an example in the Terms so it gets reported more often.
Possibly: Make sure all players read the FAQ and Terms of Service at the beginning of the game in order to do anything? If you're an older player you can refresh your memory or just scroll down and skip it.

The incidence of people scamming based on dwarves alone is pretty high, so something definitely needs to be done. Could people say their preferred idea below? Either original or options A or B.