My five month old has been bottle fed exclusively with breast milk. I started introducing formula a week ago as I want to phase out breastfeeding. He was fine with a bottle of formula per day, and even seemed to prefer it to breastmilk! I have been slowly increasing the number of formula feeds each day. Since doing this, his bowel movements have increased from one per day up to 3 per day. This morning I noticed a fleck of blood in his stool (it was a tiny amount, about the size of a grain of rice). Should try a goats milk or soy formula instead or is this a normal reaction to a change of diet?