This is often associated with habitual vomiting, and is due to similar
causes, but particularly to the sugar, which should be greatly reduced
or omitted entirely.

_What changes should be made when there is habitual colic?_

This is generally due to an accumulation of gas in the intestines
which forms there because the proteids (curd) of the milk are not
digested. They should be reduced by using in the early months a weaker
formula--i.e., instead of Formula V of the First or Second Series, IV
might be used, or, for a short time, even III. The proteids may be
reduced in the middle period by using weaker formulas If we desire to
reduce the proteids without reducing the fat, we may change from the
Second to the First Series.

Another means of relieving habitual colic is the use of partially
peptonized milk (page 115); still another the dilution with
barley-water instead of plain water.

_What change should be made if curds appear in the stools regularly or
frequently?_

This is usually associated with habitual colic, and has to be managed
exactly like that condition, by the means just described.

_How should the milk be modified for chronic constipation?_

The constipation of the first weeks of life has been already referred
to (page 82); it usually disappears as the food is gradually
strengthened in all its proportions.