One of the reasons some of the cattle where not introduced into North America until recently was that there are import restrictions from some countries due to diseases like hoof and mouth, and only embryos can be brought in, which is pricey.
Talking about rough looking udders, some of the older Herefords had some pretty rough udders. Looked like bananas hanging under their bellies. I have seen a definate improvement in the Hereford udders due to cattlemen /women culling and careful breeding.
The problem with some of the minor breeds is the narrow gene pool, which restricts finding strong animals to counter act faults. They are simply harder to find because of the low numbers.
Nite Hawk