Archis,
Only experience with a live being in a
dinghy and on davits is my own 180 lbs body in my
dinghy (205 lbs) in various stages of raising my RIB up by the davits. Despite four attachment points on that RIB, eyelits/eyebolts, it’s very unstable process that would lend a dog or any other non-rational being (child included) to leap in the opposite direction when the
dinghy reacts to weight and pressure being applied. My davits are sturdy and attached to my Hunter arch. Therefore I wouldn’t even consider this viable.
I’ve seen dog vests with carrying handles, but I concur with the Portuguese real experience, once again he’s out front in the race to ponder these great questions.
Might you consider a dedicated outboard hauler, that pivots or swings?