Beautiful bully's!! and welcome to EBN, and I second the question, HOW did you get your avatar to do that? That is way cool!! We get to see all 3 of you!!
Oh and ladies who asked. I believe the flashing avatar is a .gif. You can create one using a photo editing program (they used to be available online for free) that creates animated gifs. you take whatever pictures you want to use and superimpose them on each other so they flash. It's the same way they get eyes to blink and such in gifs. two pictures that are very similar with eyes open and eyes closed and you get blinking eyes....
Now all this said. I have not done this myself for pics, I'm just relating what I was told by someone who does and who I had do some animations for me a while back.