I will check the boys for the dots when I get home from work today.

We also had a ferret (Rascal) from Manitoba. He had the most brilliant yellow teeth you've ever seen. The vet had no idea why. He died at 2 years of age from a stomach hemorrage. An autopsy could not explain it. He was also a horrible biter. I believe he was genetically damaged from the start: accounting for his biting and yellow teeth and eventually his demise from the stomach hemmorage.