Old MacDonald Had a "MO"......E-I-E-I-O!

"Foofi and the MO"
Today I received a glorious gift bag full of tiny treasures from two of my Darlings who have just come back from Vancouver! What a surprise! One of the treasures is the most beautiful lot of wool since time began. Foofi would not stop sniffing it and was far more curious than usual.....
I said "He can probably smell the 'Mo'".
"Pardon?" SHE said.
"He can probably smell the MO" I replied.
"What is a MO?" She asked.
"Sort of like a sheep but kind of  like a llama." said I.
"There is no such thing as a MO" She said. "There is no MO"
"There is no MO what?" I asked.
"NO, there is no such animal as a MO!" She yelled.
"Well," I said smarmily, "then where does MO hair come from...a GOAT?"
"YES!!!" SHE yelled.
"Oh."