Sleeping in the bed

I love to sleep in the bed with Momma and Poppa. I ram myself in tight and sleep. It's probably the coziest place in the whole world. I used to like my own bed in my crate. But this is SO much better. Sometimes I will kick or push just so I can get in the most comfortable position. I don't think Momma and Poppa like when I do that ... I can't help it... I've heard talk of 'getting a bigger bed'. I don't know why that's necessary.