In the first dog-feeding scene, a soldier gives a dog named Hercules a bowl of food. Hercules' dog house has a sign that says "Hercules" on it. In a following scene, Smythe gives Hercules a dog treat, and he's in a different dog house, without the name sign. In the rest of the shots, he's in the original dog house with the name sign.
After Danny says goodbye to Chips, he walks to the bus stop along the road. Approaching the station from right to left where he waits for the bus. The family soon follows in a truck to give him the dog. The bus arrives and before Danny can board the family arrives in their truck, but somehow they pull in from the opposite direction, left to right, though they drove the same route that Danny had walked.
In the camp where the dogs are trained, there are both black and white soldiers side by side. The US armed forces were not racially integrated in WWII.