Does anyone have any good recommendations for a good fatty acids for
baits for coyotes and fox. Some people say vegetable oil.I'm scare it
will because rancid.i guess some all natural fatty acids i can use.
Thanks for any help.

Anchovies come to mind although I would imagine they’re expensive?
If it doesn’t work out send them to me lol

animal fats.

Which one do you prefer

avacado oil is another option

duck fat if you dont mind the cost.

note even with animal fats, you still need to keep them refrigerated for long term storage

Render the oil out of spoonbill belly fat. Pressed fish oil wont hold a candle to it.

Don't have spoon bill around me in my area where can 1 get some oil from.
Thanks

Jack mackeral or catfish cream

If you do any comparative testing my experience is you will end up finding a good sun rendered fish oil will have the most attraction. Some fats and oils will have very low attraction.

Catfish are good.

I save and freeze all the waste fat trimmed from smoked beef brisket. I put some in a dirt hole once to see what would happen and it looked like a land mine went off.

I tested that once didn't get to much reaction here

Which begs the question, is the fat needed as a filler or added attraction.

Not a filler more for attraction for base that you are using.

Not fan of just "fillers", most formulations require a base but I try to use one with the most attraction I can get. There might b some formulations than need a conditioner to keep it from drying out but again there's some that will fill the bill and add attraction.

Beaver fat is typically easy to obtain. It renders down pretty well and is something predators will eat readily. May be worth a try.

Okay thank you

horse tallow can also be used in formulation and is dynamite