Thanks for the feedback! Glad you liked it.
There is indeed an indicator when you get one the breeding goal. The "x" turn into a green check and there is some firework effect.
It might be that you were missing one of the specific trait (eye color, wrong tail color, wrong spot on the eyes) or It might be a bug... I didn't have time to test extensively and some combination might not get detected properly. ^^
In any case glad you had fun and thanks again for the feedbacks. :)