the perils of dog ownership

This morning PB came into our bedroom to let me know someone was up with Pashys foot. He thought that maybe since he has been sleeping on it funny, it was bugging him. A little later this morning, I was packing my lunch for the day. This is usually Pasha's favorite activity since more often than not, he ends up with an extra treat in his bowl. And today, it was steak no less from the night before! But it didn't budge him from bed. When he finally did get up, he didn't put any weight or pressure on his back right leg so I had to carry him down the stairs to go to the bathroom. We are going to go to the vet later today and I know that he will be okay in no time but in these circumstances, I just wish that he could talk to us and let me know whats wrong! Do you guys have any pets? Also, can other animals limbs "fall asleep" and get pins and needles they way that ours do?