Fermented feed smells like death

[Saaniya]

Is it supposed to smell like the worst thing you've ever smelled?! I'm hesitant to give it to them. I had it under water in a container for 3 days and it smelled disgusting from day 1. I ferment our food and if anything smelled like this I'd assume it was contaminated and dump it. Is it different for feed?

Don't give that feed if it's smelling like hell it will cause yeast Infection