He's been spending about an hour at a time in the cart and then a few out. He has a couple of sores on his groin area (but he had diaper rash before that so I'm guessing the added irritation didn't help matters), and he has some sores on his feet where he's been dragging his front paws and ramming one of his back paws into the rear wheel.
I can only suspect that he is leaning to the side because of the feeding tube, although it in no way touches any of the cart, but maybe something inside of him feels funny or there's some extra weight on his side with his body all stretched out like that. He has started to eat a little on his own. Only baby food consistency and it's not yet consistent. He did drink some water on his own and then decide to blow bubbles with his nose, so we can't leave him alone with food yet - at least liquid food, but he's practicing every day.
The cart has been fantastic for him to go potty in! He has always let me know when he's had to go, now I just put him in the cart when he's ready and roll him outside and he goes out there - it's great!
When he's not tired he will move his legs with the cart. He's still knuckle walking, but if he's working hard enough he can get his feet into the right position. Left side is definitely stronger than the right, but he has had moments where he's had both front paws working perfectly for a few minutes, and both back legs doing the right thing.. although he sits to the side so one leg is up higher and that one seems to kick a lot more - like he needs a Kick and Go or a skate board. Yesterday at the vet though, he had his front paws up in the sturrups and his back paws where actually running as we rolled back out to the car. I'm hoping that the more he's in the cart, the more aware he is that he's not moving and the more frustrated he gets that he'll actually start to move it and figure it out. He's definitely aware in the cart that's for sure! He turns now when you call his name!