Thankyou so much for this Sherie, i realise now tha Lachie is not constipated as first thought and that its just the way he poo's.
He poo's every 2nd-3rd day and although his face goes bright red, and looks like he struggles when pushing and gets all teary (doesnt cry), his poo's are not hard like you described, they arnt completely soft either but soft enough, and are the colour you describe too.
I am really glad you posted this, as i was about to change formula, but will now keep the same formula and seek help re:reflux meds as talked about with you before