Here's why:
* They were TV specials, not full-length movies: These were made specifically for broadcast on television.
* Licensing and rights: The rights to these specials may be complex, with multiple parties involved.
* Limited demand: While there are dedicated fans, the demand for these specials on DVD might not be enough to justify the cost of production and distribution.
However, there are other ways to watch these specials:
* Streaming services: They might be available on streaming services like Hulu or Amazon Prime Video.
* Digital download: You might be able to purchase them as digital downloads.
* Official website: The official Family Guy website may have the specials available for purchase or streaming.
It's always possible that the specials could be released on DVD in the future, but as of now, there are no official plans.