Hi Coral! Here are some new entries for you to consider.
#44 and #45 use the font you mentioned, one in all caps, one with only the "S" and "T" capitalized. If this font is your preference, you should stick with it. But I will say that I'm not quite sure the style of the font really matches up well with the style of the logo image.
I started playing around with the logo a bit to see how it might look to reverse it out of a circle and add a stroke around it so I could mix both colors into it for some balance, so entries #46-#49 let you see how that would look.
I also played around a bit more with some other fonts that I have that I think do match up well with the logo. I must say that I think #46 and #48 are my favorites. #46 has a bit of whimsy in it that matches well with the paw print image, and #48 has a few similarities with the wordmark in #44, but I think better matches the logo image. Of course, that's just my opinion, and it's your opinion that counts! Thanks!