Hi, I used a harness and he isn't having any trouble with neck or legs.
I see. Thank you. So, if it was caused by the hike, it's possible that he will recover in a few days? Should I continue to take him on walks, or is it better to let him rest?
Hi Candy! Thanks for following up. The heating pad worked and the twitching went away immediately. I'm still dealing with the unrelated diarrhea problem though. I'd switched his food a while ago which gave him diarrhea. It went away for a day, but on that day, he seemed like he had something in his throat that he was trying to cough out so I stupidly gave him milk to wash it down. That night he got diarrhea again and he's had it for about three days: small amounts, pudding texture with small amounts of bright blood occasionally (like a drop at the end but not every time). I withheld food and am now giving him plain white rice and boiled white turkey. Everything else is totally normal -- he acts completely fine: happy, energetic, etc., but I'm worried! Thank you for your help.