UPDATE: Spoke to nurse advice line last night and she advised me he would be fine to wait and speak to his pediatrician in the morning. I called and spoke to his pediatrician his morning, she stated he is constipated which I was aware of. We are switching formula. His pediatrician stated she doesn't like boys on soy. She did advise me to give him some pear or apple juice diluted to help soften his stool. Thank you all for your input. Hoping switching formula will help him.

We have been on formula (soy) for about 6 weeks started with supplementing but stoped BF about 3 weeks ago. He has had very firm poops and only once a day. He eats about 4 oz every 3 hours. This was his poop today.. has dark spots unsure if its normal. He 7 weeks 4 days.