Farm Animal Conundrum

[Tartar Horde]

Lets take the "survivors" scenario, a world of severely reduced human population, including Farmers etc. The amount of domesticated animals that will escape into the countryside I think will be huge. Devonians point about dairy Cows is right, but I believe only to a certain point. Is it true that 100% of all dairy cattle will die if not milked, I'm not sure myself as nature has a way of overcoming such things, even if the Friesian dairy cow dies out there are numerous other breeds in small farms that are more hardy and would survive to breed in the wild. It won't take too many generations for these animals to start reverting to their earlier types just like feral Hogs do. Highland cattle are an obvious contender for thriving, as are Pigs and sheep. The American Buffalo would do well and there are quite a few in Zoos and wildlife parks, there could be all manner of animals that find our mild climate and good grass growing land a paradise without humans. There are downsides to every scenario though including the escape of all the big cats and Bears, not to mention Hyenas and the like, all very capable of surviving our winters, and without humans it will be a supermarket for them, imagine all the food for them, food that doesn't know what a Lion or Tiger is.