What is alpaca ?
Alpaca
The alpaca ("Vicugna pacos") is a species of South American camelid. It is similar to, and often confused with, the llama. However, alpacas are often noticeably smaller than llamas. The two animals are closely related and can successfully cross-breed. Alpacas and llamas are also closely related to the vicuña, which is believed to be the alpaca's wild ancestor, and to the guanaco. 
There are two breeds of alpaca: the Suri alpaca and the Huacaya alpaca.
Alpacas are
for both the animals and the handler.
Behavior Spitting.
Not all alpacas spit, but all are capable of doing so. "Spit" is somewhat euphemistic; occasionally the projectile contains only air and a little saliva, although alpacas commonly bring up acidic stomach contents (generally a green, grassy mix) and project it onto their chosen targets. Spitting is mostly reserved for other alpacas, but an alpaca will also occasionally spit at a human.
Spitting can result in what is called "sour mouth". Sour