Rose, you asked what ideas, besides using an SNS, could be used for a lazy
nurser.  I don't ever use the SNS (all that fine tubing gives me the
horrors!) but there are several other strategies to try. (1) Find out the
cause - poor positioning/latching?, or low breastmilk supply (small babies
sometimes only suck actively as long as milk is flowing, the rest of the
time they doze and flutter-suck), infrequent feedings? short breastfeeding
duration? sometimes an infection, eg UTI? (2) Thoroughly review positioning
and breastfeeding technique (3) Use breast compression to facilitate
drainage and increase baby's intake (4) Switch-nurse (switch breasts when
baby starts to doze) for 30 minutes then *stop* breastfeeding (5)
Immediately after feeding, top baby up with any previously expressed
breastmilk - by spoon, cup, bottle, whichever method mom finds most
acceptable (6) Immediately after this pump/express any milk remaining in the
breasts, store for next "top-up".  Give mom enough information so that she
can monitor urine/stool output and weight gain to ensure that baby is
"getting enough".

My observation is that "lazy" babies are often under-fed babies, they may be
small, prem, low-weight-gain, compromised in some way.  Rule #l FEED the
baby. Rule #2, DRAIN the breasts.  Then patience and persistence.  As the
baby's nutrition/condition improves he usually takes over breastfeeding for
himself and mom can gradually phase out the compression/switching/topping up
and expressing.
Pamela, Zimbabwe