Entry #119 - This is our favorite. Could you play with putting the 'pet' over the 'back' to see how it would work as a square logo? Could you also play with colors, specifically conveying trust, hope and pets?
For entry #121 could we see a dog outline in addition to a cat? Perhaps balanced against the cat? Thinking out loud, the cat is the 'pet' (as it is currently) and dog is the 'back?' Not sure if it will work or not though :)
We like entries #123, #124 and #127. However, the top of the 't' and the tail of the 'p' are hard to recognize (e.g. one of our friends thought the name of the product was "Pef back". Could you increase the size of the bubble and square slightly to reveal more of each letter?