Thanks for the comments. I hadn't actually noticed how much bigger Natalie is than Sirius until I downloaded these from the camera. She's looking a little pudgy to me. She had bronchitis and slept for a week, so I can definitely tell she has gained a little weight by missing out on her daily hurdle-jumping. I didn't have the nerve to attempt pictures again today- but should be funny- especially if I can get them to sit biggest to smallest.