Turns out that llamas are actually mainly confined to the andes, although their ancestors were less confined the llama and it's ancestors who were on north america (not counting it's direct ancestor from which camels also evolved) were primarily mountain dwelling creatures. It actually makes sense for llamas to be primarily confined to the mountains of ascalon, cause although they are very hardy animals they primarily lived in more humid environments at higher altitudes where vegetation was more plentiful.
As for mooshrooms, it is very possible that what you are doing is nearly changing the appearance of the mooshroom to the point that it's own child no longer recognizes it. It could be that mooshrooms see the mushrooms on a cow as a sort of like how baby gulls see the red spot on an adult gull's beak. It serves as a visual cue to the baby that the gull that "hey this organism will most likely feed me ok food", which in an environment like the mushroom isles which probably has a few toxic plants it is not improbable that behaviour like this may have been an adaptation that the local populace developed through natural selection. Maybe brown mushrooms are poisonous to mooshrooms, and so the red color could not only just be for the baby but for the adults signalling what is safe to eat and what isn't. Changes like this would not necessarily mean that mooshrooms are different from cows, only that mooshrooms have slightly adapted to a different environment enabling them to better survive
I had originally thought that llamas lived in the andes as well as some of the outlying plains, but after fact checking, and re-checking my sources I drew a different conclusion.
sources:
https://en.wikipedia.org/wiki/Llama
http://animals.nationalgeographic.com/animals/mammals/llama/
http://www.bioexpedition.com/llama/
http://www.audubon.org/news/why-do-gulls-have-red-spot-their-bills
