Yeah, she clearly doesn't actually walk him. If the reasons she gives for not evidencing the walks, like, EVER, were true, she'd have mentioned them already. Or even something like "just got home from walking Hank and now he's tired". Instead all we've had till now are claims that she's barely left the house for a year and he hates walks.
Also, not everything is about her weight or mental health. I guess she brings everything back to those as they're her USP but