Technically correct.
The best kind of correct.
the only kind of correct

I’ll allow it.

Boa

Tsetse?
Don’t forget aye-aye
the goat that used my mailbox as a buffet
Fly, ant, owl, cat, dog, cow… I don’t understand the point of the initial tweet?
3 separate letters, some just repeat, so the commenter is technically right since the question didn’t specify only 3 letters.
No, I get the reply. It’s the initial tweet (what animal has only three letters in it) that I don’t get the point of.
What did you expect from a sheep?

Hence the reason it’s almost certainly fake. Even a 5 year-old could easily rattle off several animals with three letters in them without much thought.

Now if it was something like what animals has only two letters in it, that’s something most people would actually have to think about.

spoiler

My answer: Ox

Spoiler

Ox 

Aren’t really different from bulls, just different intended use cases and reproductive statuses

Bull works.
I don’t think the wording of the prompt allows for repeated letters to be one
they should have programmed it that way then
With the repeated letter rule, tit or ass would also work.
Only one besides Ox I can think of is K9.
Engagement bait. It’s to farm karma for bot accounts usually.
Fox, hen pretty sure snek

Eel, ray, rat, bat… is this engagement bait for people who think they’re smart the way that AI slop with veterans with no limbs and ‘NOBODY WILL TELL HIM HAPPY BIRTHDAY 😢’ is engagement bait for the moderately senile?

Or maybe just fake, who knows.

This is the old times fun you had in road trips before you became a soulless shiny glass zombie. That and globbering your younger brother when he foolishly replies “yes” to “would you like an hawaiian punch?”
awk
An excellent observation no wonder they called you awk eyes in boot camp.
British hawk.
I was actually aiming for “auk” but it was late and my linux brain took over.
No one has said pig yet
Leave my mother in law out of this. Ha “Ram”
cop also works
They just said pig
Family Feud- Alligator Fast Money (FULL)

YouTube
Yes because it didn’t say 3 unique/different letters. They don’t lose their value as letters just because they repeat. It’s still 5 letters.
Llama, bonobo, elephant(it ate some of my mail)
An eyeless fish
Fuck Reddit and Fuck Spez.

Sure, agreed, but why say that in reply to this post? I feel like either there’s a link here I’m not seeing or this is just spam.

EDIT: Got an explanation linking the post to reddit. I missed the bar at the very bottom showing reddit stuff.

Image source is Reddit (branded on the bottom)
Ahh got it, I missed that, thank you!
Alligator! ^bruh^
Most animals are full of microplastics these days, but I’m thinking that almost none have any number of letters in them. (Unless maybe cow magnets have a model number stamped on them?)
i knew a goat that liked to chase the mailman. i’m sure she had a few letters in her
My dog after he ate my mail