try not to worry (yeah right)

the meds that the vet has put him on might just be the reason that his stools are runny.. and if it all possible maybe proping up his crate to help elevate him so the fluids wont settle in his little nose causing him breathing problems, kind of like a small child with bronchitis and It might not hurt to try pedilite to replace his electrolites.
please keep us posted!!