YAK complicated, but interesting

YAK complicated, but interesting. The result is gorgeous. Thank you.

Greedily, he breathes fun
the Fresh air of the fields,
SIZ pairs of boils and radiates
From the flaring nostrils,
Full of strength, delete at will,
a Loud voice neighed,
Startled the horse and in the field
Swift jumped!
(N. Languages)