Full Blooded muscovy or mule duck?

[poultrylover12]

I have a large drake muscovy. I bought him believing him to be full blooded. But i don't know if he is a mule or not. Because he doesn't have a full mask. Can someone please tell me a way i can find out if he is full blooded or if you know somehow from these picture below.
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[FarmrGirl]

The mask develops over time as the drake ages, so that's not an indicator... his caruncules will develop larger and more warty over time (and each caruncule will be uniquely individual). Honestly, I don't think you'll be able to determine if its a mule based on how he looks. Sorry. Finding a reputable breeder is really your best bet on this.

 

[poultrylover12]

Okay thank you

 

[Miss Lydia]

Okay thank you

He sure looks like he could be full Muscovy drake though. He's beautiful