Constipated 6 week old

[Curtlawyer]

Sheldon, a newly rescued baby, wont poop. He eats grudgingly, (goatsmilk, yogurt, a little heavy cream and water) and I have been hydrating between feedings. He pees well. I cant feel any blockage or bloat- he feels soft and squishy. I have given him apple juice, warm soak in water, many massages, tickled hs anus with finger, q tip, warm cloth, etc. Not even a sign of poo. He came to us 2 days ago, I have had him for over 48 hours and not seen any poo. Is there anything else I can do for him? it is obvious he doesnt feel good.