I really don't want to sound rude in anyway or to seem like I'm chalking up your dog's health issues to breed traits in anyway, but I think you should really talk to some Schnauzer experts also, because the standing and just staring sound like the schnauzer stare or schnauzer glare a breed trait especially prevalent when schnauzers are "thinking" or trying to comprehend something, going through a change.
Although it seems strange to other breed people schnauzers commonly stare of about a minute especially when there is a routine or physical change for them (like being sick). Lethargy and depression are also common when there is a physical change, like not being able to do as they normally, as I'm sure you know they are such a hardy and endurance minded breed not being able to do can cause serious depression for them. My Princess is allergic to fleas, we got fleas from a stray we brought in for a couple days, she got a hot spot and we treated it but she literally spent three days in her "box" absolutely miserable I was freaking out until some breed experts explained schnauzer specific behaviors.
You should really talk to some schnauzer experts, if you need a few recommendation I can hook you up with some schnauzer experts that have advised me before. I really hope it's just a combination of a change in health a breed behavioral traits rather than a really seriously turn of events for both of you. |