Just so you know, Alpacas chew with their mouths open. It is shocking to think this is entirely acceptable in their society, but it is (in fact) encouraged. It has something to do with competition, as in, my-mouthful-of-cud-I-can-regurgitate-at-will-should you-ever-cross-me--suckah--is-better-than-your-mouthful-of-cud.
I'm providing this as an information service so that the next time you have an alpaca on the dinner party guest list, you will know to reconsider, or to seat her across from the guy recovering from lasik eye surgery.
(I say "her" because I know you would never have a male alpaca on the guest list. They're just tooooo unruly.)
Another common alpaca rule is that alpacas never get sheared when they are wet, for reasons not only of decorum, but also because it's impractical to shear a wet animal. If an alpaca says on a friday night that she's just washed her hair and she can't do a thing with it, you shouldn't take it personally. Simply call another time.
It has been raining enough for the last few days that shearing has been postponed. Everything is clean and sterilzed and ready to go. Until then, it is perfectly permissable for small boys to splash about in the muddy corral, provided Mom has Purell in the car and a change of clothes for the ride home. Alpacas won't be held responsible for where that water has been.