Here's why:
* Different species: Insects belong to the phylum Arthropoda, while dogs belong to the phylum Chordata. They are so different that they cannot even reproduce within their own classes, let alone across kingdoms.
* Reproductive differences: Insects and dogs have completely different reproductive systems. Insects reproduce via eggs, while dogs give birth to live young. Their anatomy, fertilization processes, and gestation periods are entirely incompatible.
It's important to remember that reproduction requires a significant degree of genetic similarity. Insects and dogs are simply too far apart on the evolutionary tree to even consider the possibility of interbreeding.