Gotta Love Poor Choice in Words

Here is a posting from craigslist:

"Hey there. It just saddens me to see so many of our larger friends tied and chained in a yard day after day. They may looks cumbersome and slow especially next to a smaller high energy terrier for example but for their overall health they need some play time and exercise just the same. My associate and I (both broke students) willwalk your dog, run with him and help bleed off a lot of that pent up energy. Our rates are flexible. Hope to talk to you soon"

I recommend omitting the word "bleed" from an offer to dog-walk.
(could it be a joke? it just seems too subtle....)