I don't think your wrong in feeling that way at all. I would have to be in a very dire situation of need to consider boarding. Just like sending a little kid to daycare a pup can't tell you what they did all day. It'd be much more comforting for them to be some where that at least resembles a home setting.
I'm sorry you're having a hard time getting someone to commit to doing it. Would your vet possibly have someone they could recommend or maybe a collage student off for the summer you could get to know over the next month?
__________________ For The Night Is Dark & Full Of Terriers |