Some dogs seem perpetually youthful, in our breed most are vibrant and active well into the early teen years. If they have lived healthy lives the first glimpse into the geriatric schnauzer appears around the 12th year. It happens quick, like.... you go to bed one night and wake up the next and you have a Senior schnauzer. They move a little slower, sleep a bit more and start to not respond as quickly to your commands. Mersey is going into her 11th year and I hate to admit that she is ageing a bit faster then I am use to with my dogs. She is happy, eats well, but, she just seems...old. I think it is time for a vet visit to see if there is anything out of the normal going on with her.