Ermine redirects here. For other uses, see Ermine (disambiguation). The stoat (Mustela erminea), also known as the short-tailed weasel, is a mammal of the genus Mustela of the family Mustelidae native to Eurasia and North America, distinguished from the least weasel by its larger size and longer tail with a prominent black tip.
Although there is a wide range of ages at which babies stop burping, if your daughter is now 4 months old, and does fine without burping, then you likely can simply stop trying to burp her. It may be that she is just not swallowing much air as she eats anymore.
Typically, babies start sitting at 6 months, but this should not be taken literal, but as a ballpark. So babies that sit near 5 months through 7 months, this is OK. If your baby is sitting early, I would also ask, is your baby rolling over because, with back to sleep, (which is a MUST!) and babies are not going on their belly as much, some babies HATE to be on their tummies and would prefer to sit.