Lately my Tess has been looking plump. Where before she had a bit of a tuck between her legs and tummy now she looks quite barrel-shaped.

I weighed her this morning and she has put on about 1.5 pounds. I'm worried that she is filling up with fluid, even though she's been taking her heart medicines regularly. I've left a message for her vet to call me, but I thought I'd ask here if this could be a symptom. It's entirely possible that she was fd too much while we were on vacation but I don't recall her looking this plump when we picked her up at the boarder's. Any advice or thoughts from forum members?