Sicky poo baby

(Warning! Non-parents may be grossed out by the following blog!)
So, I was out to coffee with some other mummies and babies on Tuesday - my standard Tuesday lunch date. And all of a sudden I smelt something funny coming from Marius's direction. So, I gathered my nappy bag and the kid and went into the bathroom for what I thought would be a routine changing. But to my surprise the poop had shot out the backside of the nappy and all over his back and shirt! I haven't seen a blow-out like this since he was 6 months old! I hadn't even packed any extra clothes for the boy in my bag, since it's been ages since we've had to change clothes due to a nappy! Luckily I managed to salvage his outfit with only taking of his shirt and leaving the sweatshirt. Anyhow, that was the beginning.... All week we've had explosions and the poor boy has had one really bad nappy rash.
It didn't seem worth calling the Dr. though, and since we only have GP's here and no pediatricians, I didn't want to deal with some regular Dr. But today it's gotten a bit worse. I think it probably has something to do with Simon taking care of Marius all morning while I was volunteering at a nearly new sale for a charity I help out with. While, I may get chewed out for writing this... I think he let the boy fall asleep for an hour with a dirty nappy... Hence the super red butt I am now dealing with. Then he gave Marius left over mashed potatoes for lunch! The potatoes were a bit overly milky anyhow, and the boy is allergic to cow's milk. What in the world he was thinking I'll never know... But the poor boy's stomach has been purging itself from the bottom all day. Oh, I could just ring that daddy's neck sometimes!!!!
Well, to make matters worse, pedialyte does not exist in this country. So I tried making my own homemade sugar/salt concoction. I even blended a banana in it. But the boy refused to drink it. Thankfully Simon's mom is flying over on Monday, so I asked her to pick us up some pedialyte. Marius doesn't seem dehydrated or really bad, but it can't hurt.
So, any advise out there mommies on what to feed a 14 month old with diarrhea? I don't want to starve the poor kid, but I don't want to irritate his intestines any more. I gave him chicken/veggie soup for dinner with plain old white bread (I'd never buy white bread otherwise, but I didn't want to give him much fibre). I think I'll just give him bananas for breakfast and then try with the soup again for lunch and dinner. Part of me is wondering if he's allergic to soy milk, and it's just taken a month or two to manifest in his poops.... As we've switched to soy milk for him when he turned one. I think I'll buy rice milk and make the switch to see if that clears things up. Oh gosh, I hope he gets better soon. One or two days is fine, but 5 days is really starting to push it. I know I'd be calling the Dr. if it were me.
I can't remember who told me that when I had a kid, poop would be a routine topic of conversation for me and that I'd eventually go so far as to put a poopy diaper in my purse one day to show a Dr! I thought they were crazy! Yeah, well, I've been there and done that! And I'm still talking about poop all the time.

So here's some fun videos of the boy. You can see a little bit of his walking skills in the first one, but mostly it's just him making a mess.

Here's another one of the boy. He loves pulling all of the shampoo bottles into the tub and then he throws them out of the tub. We have started to end "bath time" when we throws the soaking wet washcloth out of the tub though. Because that just leads to a very wet bathroom mat and floor.