I am feeding my 10 day old (I think) baby the Exact Handfeeding Formula. I see recommendations here to feed them defrosted peas. What is the difference between these two? And with the formula, how do I know how thick to make it? Right now I am mixing it to the consistency of ketchup. But...

http://www.petsolutions.com/Breeding-Supplies+C58.aspx Click on each item to see the different amounts offered.