It is possible I am doing something wrong, but I can't figure out what, so here goes.

...Yes, I was doing something wrong. I was disconnecting the logic between seeing that a silver dragon must have a silver gene and having the genes discovered. Go ahead and delete the post. I feel stupid. ;)

What I'm trying to do: search my pets for all dragons with silver coloring (homozygous or heterozygous)

How I do it: I set the search for

• Dragons
• Gene 1: Color: Silver
• Dominant or resessive

What I get: any dragons that are heterozygous for silver coloring, but none of my dragons that are homozygous. 

I retried the search using "dominant only" and "homozygous" options, and they both returned no dragons at all. I don't know if it's just an issue with silver coloring, or if there are other search options that aren't working, but I thought I'd report it.

Sorry for the quick update, but I just realized there's a similar problem when shopping for silver dragons in the pet trades or as breeders. I always assumed I never saw any because there weren't any for sale, but they are just not showing up - when you search for silver, you only get those with heterozygous silver genes. 

Searching for a specific color, or any gene for that matter, will only bring up pets in the search that have the gene researched.

I did a quick search of all the dragons up in trade and there were 3 with a Dominant Silver gene; they just weren't researched. When doing a search of your stable I saw that your Dominant Silver ones (or at the ones I checked) weren't researched, which is why they weren't showing up.

Edit:: When typing this up your topic wasn't updated yet with the information that you figured it out. I only saw that after posting.