Conditions My pig has a tail?!? Weird fat folds?? diet and health questions!

I recently adopted two boars in hopes of eventually bonding them with my sweetheart Chester.

The one male I rescued is two years old and all he wants to do is sleep. His previous owners fed him unlimited kaytee pellets, yellowish hard hay, and tons of yogurt drops along with a celery stick or carrot stick a day.

I have only had him for two days but I am integrating Oxbow adult pellets into their kaytee and am cutting down in how much pellets they are fed. I have unlimited luck timothy for them and two servings of veggies, red leaf lettuce and romaine in the morning and a bell pepper, baby carrot, and cherry tomato in the even. I give little strawberries every once in a while for treats.

Their poops were a dry light brought color when I first got them but after feeding them veggies and putting some oxbow mixed in their kaytee pellets and giving them fresh hay they poops have turned a darker color but are now a little mushy. I wouldn't say diarrhea but when they walk on the poop it smooches down pretty easily. should I feed them less greens?

Also Max is huge. Not only is he a large guinepig but he has the weird fat flaps. He has a large double chin and while it is super adorable it seems incredibly unhealthy. He has the same sort of fat deposits near his hips under his legs if you can picture that…

His nails were also never trimmed until I brought him home. I was fortunate enough not to knick his quick in any of his toes and still trim his nails down quite a bit. They are still curled but it looks much more comfortable to walk.

I looked over both boys when i got them home and all seemed well. Neither had any cuts and they weren't sensitive to pets and rubs. And when I held the official introductions between the two boys (the family had them in cages next to each other and the kids let them 'play together') Hershey got boar glue all over Max's butt. I want to clean it off today but while inspecting it I realized Max many have a tail??? It looks like a path of hair that has been stuck together but When I trimmed the hair down I noticed there is a flap of skin there. Mad is such a sweetheart and won't scream or bite but I can tell he doesn't like when I tough it or other part of his back because he will push his nose in the ground and nibble in probably the most violent way he knows how (which isn't violent at all hahaha)

His body is just really weird because i can feel his bones on his hips and back and it makes me feel like he is skinny but then he had the enormous fatty areas on his underside. And he has skin flap on his little butt!!

I originally wad going to chuck his constant sleepiness as his old home was tiny and he was fed an atrocious diet. I'm hoping that he will perk up and look less miserable soon.

Right now he is sleeping on my lap but every now and again he will suddenly turn his head and groom himself rather aggressively like he had a bad itch. but he doesn't seem to mind me petting him or hold him.



Any advice on any of this??
Has anyone else dealt with any of these things while adopting piggies??

Again he's only 2 so i don't think he should have all of these issues.

Thanks guys!!