How do i make this move around like an actual pool toy?

i’ve looked all around and i just want an easy way for this darn fox to have something like soft body physics. i dont like it when it’s stiff as a rock, it needs to be more floaty- like!

pl0x help!11!11!

i feel like i’m doing this right… but it’s stiff as a rock

the bones don’t visually connect either