the reasons i think they are shorthorns are as follows:
the bulls appear to be of english decent. i noticed a lot of extra skin around the neck but not enough for me to think they had any brahman in them. they are shorthorn red and have a shorthorn appearance about the face. butts dont really like a shorthorn though.
as for the cow she looks very much like a shorthorn in the face, her coloration is shorthorn red with white tail hairs which is very common in shorthorns. her hair is a little curly like a shorthorn. however she has more length and less depth than a traditional shorthorn.
so in conclusion, i believe they are shorthorns. if i'm wrong i'm wrong.