Today my 7 (almost 8) week old baby lost the use of his back left leg. He drags it along and does not seem to have feeling and does not respond when I touch it.
His diet is still currently formua (powdered esbilac). He has only just started nibbling on Oxbow rat food (I had zero money to order any Henry's blocks until later this week).
I feed him formula every four hours and I go slightly longer at night, so he gets fed 4-5 times a day. He normally eats 10-12 ccs per meal and he weighs 136 grams.

Though I'm not sure if it's related, I thought it would be worth mentioning that he came to me with a broken tail bone, but he's never had any issues with his legs until now.

I just moved him into a slightly bigger cage on Sunday as well.
He has been sleeping more today than he normally does.