11 month old son has had hard, clay like poop since birth. used to strain to push them out but not anymore. tried more water, juice, etc. worry??

Diet problem: one of a common problem with hard stools is taking too much cows milk at this age the need for milk each day is q16-20 oz. specially if the child has been cow milk intolerant earlier like colic gas or rashes with cow milk formulas try giving more protien as meats and vegetables to increase the fiber in the diet if this does not help he needs to be checked