Poyo is acting as a surrogate mother for the orphaned kittens, while the Saito’s search for adopters.  But spending time with Poyo, each kitten is developing a unique trait.
Papa can't bear to watch, so 
he runs off to the field.
Ese es mi padre que trabaja en los cultivos porque no puede mirar.
Mi padre trabaja en el campo para no tener que mirar.
O papai não pode assistir,
então ele foge para o campo.