Need Help and Advice on how I can save my Guinea

[Zephyr0]

It sort of came out of nowhere but my male male Guinea (Piper), who was perfectly fine up until today, is suddenly very lethargic and tired and just lays there sleeping which is unheard of for him!
It has been the same story all day today and now im very worried.
Piper doesn't live in the coop he is more of a Pet really. We would be mortified to lose him.
Google is the worst place to look for any guidance on anything because there are so many different things out there there's no way to ever know...
I just need professional opinion on what could come on so quickly and what i need to do to help him!

 

[Zephyr0]

Here are a couple pics of him is this state. The one with his mouth open is the only time we've seen him like that he's never done it again. Just lays with his eyes shut

 

[Eggcessive]

Do you have any Poultry NutriDrench or electrolytes that you can give him? The PND dosage is 2-3 ml given a couple of drops at a time orally. How old is he? Is his crop empty of partly full, hard, soft, or puffy? Is he pooping, and what does it look like? How old is he? Look him over around his vent for any bugs or stuck on poops.

 

[Eggcessive]

Looking at the picture, his comb is very dark, as if he is not getting enough oxygen to his heart. Does he have any respiratory symptoms? I am not familiar with guinea fowl, but if you could also post here on the guinea forum, you may get more help:
https://www.backyardchickens.com/forums/guinea-fowl.45/

 

[Zephyr0]

Do you have any Poultry NutriDrench or electrolytes that you can give him? The PND dosage is 2-3 ml given a couple of drops at a time orally. How old is he? Is his crop empty of partly full, hard, soft, or puffy? Is he pooping, and what does it look like? How old is he? Look him over around his vent for any bugs or stuck on poops.

He is a bit over 5 months old.
Vent area is clean and clear.
He actually just pooped and itwas liquidy, clear, and hate an almost greenish color in it.
Crop feels to be empty and i havent seen hit eat alt all today. I offered him treats earlier to see if he would take them. He lethargically pecked at them but didnt even open his mouth or eat any.
At this moment I dont actually have anything like that to give him.
But im all ears!

 

[Zephyr0]

Looking at the picture, his comb is very dark, as if he is not getting enough oxygen to his heart. Does he have any respiratory symptoms? I am not familiar with guinea fowl, but if you could also post here on the guinea forum, you may get more help:
https://www.backyardchickens.com/forums/guinea-fowl.45/

Ill post there now aswell thank you!