hey hun, I am so sorry that you even have to experience something like this...
kikko used to be kind of like that, acting really puppy like and walking like he was a puppy, but he grew out of it too like sammie did. but it does sound like a good idea to do a blood work test, better safe than sorry.
poor rio, she's so beautiful and adorable, she and sammy are my fav myspace buddies!... so kikko and i send lots of huges, kisses, and prayers that everything will be oky. keep us posted
PS .... kikko saw her pic and has quite the crush now! so rio has get better b/c she's got to keep stopping all boy doggies hearts.