Is this normal with breastfeeding?

Maggi

(I haven't used this tracker frequently but I figure I'd try it out again)

My dd2 is gaining pretty slowly. I have a good supply but she tends to eat in little spurts. I cant figure out if I'm feeding her when she only wants a snack and isnt full blown hungry or what. She falls asleep on my boob all the time. I can hear her gulping, swallowing, and sometimes even swallowing too much.

Does anyone else's babe do this?