Avocado for Dogs
The internet is littered with incorrect "Do Not Feed" lists and Avocado always appears on them.
Avocado is beautiful healthy fat for both humans and dogs alike and you can absolutely feed the flesh of an Avocado to your dog. The skin and stone can cause GI issues but you wouldn't feed them anyway, right?! The stone would be an obstruction risk and the skin wouldn't be than enjoyable.

Science says Avocado is fine for dogs In 2012 Proctor & Gamble funded a study to see once and for all if Avocado was safe for dogs or not, this study was called Tolerance and safety of an avocado‐based ingredient for adult dogs.
The study found: Avocado extract was well‐tolerated by adult dogs and resulted in no adverse health effects.
In 2018, Rodney Habib & Dr Karen Becker did a video on this very topic and it's a great video to watch to learn why people thought Avocado wasn't safe and how the Proctor and Gamble study was conducted. You can watch it here.
Dogs with allergies may like to avoid avocado as it is higher in histamines.
PERSIN
Persin is a fungicidal toxin present in parts of the avocado such as the leaves, bark, and skin, and can lead to serious health issues over time and this is the reason that it was once thought that avocados were dangerous for dogs.
However, less concentrated amounts of persin 'may' be found in the flesh of Avocados, there is no evidence at this time to suggest that the flesh of avocados is unsafe for dogs in relation to persin.