Is my curly hair spiderling going to moult?

Me and my boyfriend got our curly hair spiderling two days ago now,she is about 3cm and has a very large bald patch on her abdomen, she has made a nice large burrow in her rearing jar, and webbed the majority of the soil outside of her burrow aswell, we have left her alone thinking she was due a moult, however i did throw a small cricket in just to see if you would eat it, and she ate it right up! she has eaten 3 crickets since we got her so im just wondering if this is normal behaviour for a sling? cause i know adults don't eat for weeks before a moult, thankyou