Interesting. I reckon its doable if you had space. Just eat fish!! Easier ??

I have seen several catamarans that visit here with pot plants around the cockpit!

Saw a yacht in Darwin with chooks onboard, size and the way your yacht is set up and time offshore I guess will all factor in to what you can carry/set u onboard. Fridge? Freezer? Secure storage space? I've used cryvac, drying and some solar with pump and bladder systems for topping up water tanks and rain water catchment systems in place in the past with good results for up to 8 weeks offshore.

We grew sprouts and mung beans. I banned Potted plants (too much dirt). Most pacific islands have awesome cheap veggies in season only and lots.of.fish. not sure about chickens and goats... Wouldn't work on.my boat! We had plenty of tins-but most made it back to.oz after 18/months on board.... Still have water chestnuts if anyone wants some. Eat what the locals eat. Cheap and plentiful.