Does anyone here have any experience with their senior doggies developing dementia? I also think Vino may be losing his hearing, that could explain some of his odd behavior. I obviously need to get him into the vet for a check-up, when I took him in back in February for a senior panel he passed with flying colors, but I don't suppose a blood test would measure cognitive function and the odd behavior has only been going on for a month or so, but it seems like it is progressing rapidly.