Why are the methods of polyploidy and artificial mutagenesis used in plant breeding not applicable in animal breeding?

1) a complex structure (the presence of organ systems), a complex relationship with the environment (nervous system, sensory organs);
2) low fecundity compared with plants, prolonged puberty, etc.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.