To think you should shower dc after them being covered in dog poo!?

[Okok1]

Ds1 and ds2 were at their dads and managed to both get covered in dog poo in the park (one fell in it and went down the slide and the other got it on them from the slide, dad didn't notice for a while until they had both gone down the slide a fair few times) it was all over ds1's hands and clothes and on ds2 as well.

Their dad didn't bath or shower them when they got back to his because "they had a shower before they went out I'm not showering them twice in a day"

AIBU to think if your kids have been literally rolling in dog poo they need to have a shower and clean clothes etc- ds1 is 5 so probably put his hands covered in poo in his hair and all sorts as young children do.

I put them straight in the shower when he brought them back and he said I am crazy for being annoyed and saying it was gross.

Ew. There will be dog shit all over his house

Eugh. Nightmare. Completely agree with you!! Dog poo is not only gross and smells so bad but it's so dangerous, especially to young children
Bleh

He did change their clothes and get them to wash their hands which is apparently good enough but I feel like that is literally disgusting

Um... you'd be insane not to shower them.

I'm genuinely retchy at the thought. Yes you'd shower them, at least once!

He thinks I'm insane about dog poo in general, because he doesn't make sure they look where they're walking EVER and the amount of times they come back from his with dog poo in the treads if their shoes is ridiculous I'm almost at the point of thinking he does it on purpose to annoy me because surely anyone with kids makes sure their kids avoid stepping in poo. He thinks for example just wiping the shoe off on the grass is good enough- thinks I'm insane for thinking that's disgusting because kids grab the bottom of their shoes, sit on their shoes etc
let alone have them literally playing in it and not giving them a shower.

I though you were going to say after being at the swimming baths. Or after getting tomato sauce on them or something. But poo... don't much care what it's from...

yes, poo requires a shower & hairwash. It's hardly onerous showering two kids & even if it is-tough!

I can't think why he's an EX!

It didn't matter if they had a shower before they were covered in dog poo. There isn't some rule that says that one shower in the morning is okay if you have got filthy since. Of course it's awful. They must have stank of dog poo. No normal parent would be just washing their hands. I suppose you could try to think of visits to their dad as their immune systems getting a work out. I mean out of self-interest would have thought he'd had cleaned them up because they must have smelt really bad.

I would seriously be questioning there dads ability and we’ll just basic common sense…what a Pratt.

Dog poo can be dangerous. Your ex is being vvv unreasonable.

Unless he’s being deliberately obtuse or utterly thoughtless, his comment about them not needing a second shower implies that he has a very literal/rule bound idea of the purpose of a shower. He can’t see that you should make exceptions to a rule where necessary.
I think you are very unlikely to get him to change his mind. He sounds set on the path he wants to take and sounds as if he gets a bit of a kick from riling you up.
If you do want to try to influence him to shower the poo off them you’ll need to be very concrete e.g. there is poo in their hair (even then he likely will argue the toss). Talking about germs will be too abstract. Talking about walking poo into the house won’t bother him because it’s not his house and if it was his house, he wouldn’t care anyway.
If you have general concerns about neglect, I would keep a diary of these sorts of things in case you want a change to their visitation with their dad.

Yes they needed a shower and if that wasn’t possible for some reason a thorough hand/face wash and full change of clothes.

my ex would be the same though. When my ds was 3 and toilet training and was regularly having little wee accidents (not full wee but enough to soak through to clothes) he started saying “doesn’t matter, it will soon dry off”, I kept explaining to him that he had to change when he was wet but it eventually turned out that he had learnt the phrase from his dad who did actually just let it “dry off” because he was too lazy to change him or to take spare clothes out with them.

I know you’re not asking for advice about what to do about him, but I did have a thought that might be useful to you. From this small snapshot of your lives, I get the impression that you’re someone who sees the bigger picture and he is not.
This article talks about influencing someone who doesn’t see the bigger picture. Some of the wording it suggests, you might not use exactly, but the general ideas are good.
https://covisioning.com/how-to-influence-instead-of-argue/