Stallion looks more dunskin to me, but according to the Color Calculator, there is a 7.29% chance of the mare and stallion creating a bay dun or bay foal, so he very well could be there offspring...but by judging by the pics of the two, IDK the same conformation flaws as the pintaloosa.
The stallion appears to be desperately needing some sun screen. Poor guy. And I agree that while the color of the first horse is kind of pretty, he fell off the ugly tree and hit every branch on the way down. Lol