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.
As newborns hungrily gulp down formula or breast milk, most swallow a lot of air too. When air sits in the esophagus -- as it tends to do in babies under 2 months old, who spend lots of time lying down -- the result is gas. The more air a baby swallows, the greater the chance (and the volume) that she'll spit up. You can help your baby expel gas by burping her in the middle and at the end of every feeding. If you're bottle-feeding, this means burping her after she's finished 2 to 3 ounces, or about half the formula, and again when she's done eating. If you're nursing, burp your baby when you switch breasts and again at the end.