Regarding raw fish safety in general, for humans or dogs. Here’s one raw fish junkie’s 2 cents…

Saltwater:  There is a long-standing naughty/nice list for saltwater fish with regard to species known to require parasite remediation though freezing or cooking vs those generally considered safe.  In the vast majority of cases your local sushi shop will use frozen fish, even for species considered safe without freezing.  Higher-end shops will selectively use truly fresh, never-frozen, fish and this is typically reflected in higher prices.

Freshwater:  As Jack mentioned, freshwater fish is not safe to eat raw.  Freezing does not kill freshwater parasites, so cooking is mandatory.  Your chances of getting sick are pretty low, especially if the fish looks healthy, but it’s best not to take chances.

Freshwater spawned or brackish water:  Treat these the same as freshwater fish, cook it to be safe, and yes that includes salmon unless it is farmed.  Salmon sushi is a recent and pretty much western invention, salmon (wild salmon) was not eaten raw in Japan.  I was born in Okinawa, lived there for years at a time as a Navy brat, and never saw salmon sushi/sashimi until sometime in the 80’s here in the States.  Since the 80’s/90’s though it is everywhere, including Japan.  Farmed salmon is spawned and farmed under controlled conditions so not prone to the same parasites as wild salmon and safe to consume raw.  It is still sucky farmed garbage, but you can eat it raw, and so can your dog.

Just to throw this out there. I watched Geoff Lawton’s Urban Permaculture on Prime Video.

Is this the same video being referenced in the episode.

Just double checked, it is still there and is phenomenal.

The beauty about being a polymath is that everything tends to follow similar structures. In other words, if you learn a few concepts and systems really well, then many others follow some similar structure, or, have various aspects that are greatly similar. For example transportation infrastructure, cardiovascular system, and computer networks follow similar patterns (largely known as Network Science). 

Eventually, especially if you enjoy and seek out knowledge for personal development and growth, you will eventually be good, if not great, at many things because these patterns will unfold before you given what you already understand. You will intuitively know what questions to ask, and what basic things to do in each field/project.

It’s wonderful thing to be able to do a lot of things for yourself instead of paying for everything traditional-modernly.