Does anything come of tickling the llamas?
Solution 1:
Not sure how useful you'd consider this, but I repeatedly hit the R3 button to 'tickle' for 5 minutes finding nothing ever occurred other than the repeated laughs or voice lines.
I then saved up a 10 mini llamas and gave them all a range of tickles from 1 - 10 tickles in order. I got one silver llama, the 6th one, but to me this just indicates that tickling llamas has no impact whatsoever and is purely for "fun".