EMERGENCY! BABY BUNNY IS SICK!?

I got a baby bunny, 2 months old a couple days ago and he is doing great. Happy & healthy. We decided that we wanted to get him a playmate this morning to keep him company during the day, we went and got him a friend which may or may not be his sibling, we got them from the same breeder who said they may be from the same litter. They look like twins and laid together/ cleaned each other the moment they got back together. The bunnys are Dwarf Lionheads and are both tiny only 2 months old. The new one played around today a bit was very happy when we first got them together. They are both on the same food that they were in the pet shop, so no changes in pellets. But we did give them treat chews today which is our mistake. We believe thats what caused the new one to get this way. He has very bad diarrhea nonstop. I took him out onto my bed and am trying to syringe him water with vita-drops in it. I've gotten a little in his system and he seems just like he would be normally, walking around the bed cleaning himself and the water i get around his mouth. But that diareah keeps coming out. I need some home remedies you guys! please anything will help. i cant take any risks here hes just a baby barely lived two months. Cant take to the vet in the morning due to money problems, but will do all i can to save him. PLEASE, try to help. ANYTHING Will do.