Fences duuuhhh
After the Civil War Texas ranchers drove cattle in herds to Kansas because that is where the big stockyards were at the time. It was also a place for the Texas ranchers to use the railroad for shipping cattle elsewhere.
Open land, no fences, and they could have large herds of cattle.
Yes and no! Cattle do not live naturally in the desert but ranchers allow their herds to graze in the desert.
because they wanted to get there faster and sold
Decrease
The last silver grizzly was killed in 1964 in Mexico, where it had been the country's largest animal. It was killed by ranchers protecting their herds in the Sierra del Nido region.
The railroads significantly opened the cattle industry to sales and sales meant ranchers could expand their lands and herds. Ranchers from even Texas could drive herds north to meet the railroad, and both factors helped develop towns in the Great Plains.
Growing, for now. More farmers and ranchers are going out of business or downsizing their herds, which means that there is a larger influx of cattle in the feedlots.
Because many of the ranchers wanted to keep their herds purebred. It's not that crossbreeding is bad in itself, it's just that ranchers having a purebred herd didn't want any "surprises" come spring, or have any trouble with calving cows.
Transporting their cattle to "cattle towns", where they would be sold, was a very challenging opstacle ranchers had to face. While they hired cowboys to move the herds, there was always the possibility of indian attacks, diseases and other hositle rachers trying to scare off competition.
NO! It will kill them. As Buffalo becomes a popular meat, many aspiring ranchers are lousing their herds to ignorance of oak's toxicity to the buffalo. They will eat it if given the opportunity, but they must not be allowed to.