#5 We very much like the imagery you have in this one. However, the whiskers look a bit like tears and therefore, maybe a little sad. The floppy ear is really cute! Keeping the same overall style, could you rework the face a little to look a little more dog-like. The lettering is beautiful but could we also see it in the same blue, as in #6.
#4 Again, the lettering is lovely but we would prefer something other than the poodle. Would it be too much having a couple of animals facing each other, something like you have in #6.
#6 Right now, we cannot see anything we would want to change about this one, but we will keep looking at it and let you know.