Scottish Terriers?
(In before the Pit-Bull-and-related-breeds-are-nothing-but-misunderstood-loyal-fluff-balls-that-won’t-hurt-anyone-and-are-huggy-bears-for-toddlers-and-infants crowd.)
By the way, the kids birthday is today. He would have been 6.
I will NEVER understand the people who simply do not get this. When do we read about people being mauled by Corgies, Dachsunds, Beagles, Bassett Hounds, Labs, Cocker Spaniels, Poodles, German Short Haired Pointers, and so on? Seriously.