Rain is a whopper at three months, but she's not pulling momma down any, so I'm not too worried about it yet. Rain is already eating very well and I rarely see her nursing anymore - even then it's only for a couple of seconds, then she's off again. Momma doesn't seem to care one way or the other. Rain may just be weaning herself, I guess.
Rumour was doing the same thing a week before I weaned her. It was as if she only nursed because she was thirsty and didn't want to walk all the way to the water trough lol