Need Some Advise on Puppy and What I'm painting today!

HI, I've been painting this watercolor of corn for a commission. A pour first then the drawing.. It will be a pig too. I finished the little hummingbird and hope to have that framed for my class this weekend. The class is on painting hummingbirds. We now have 2 males and a female Ruby Throated Hummingbirds visiting. Sadie ,the puppy,saw them last night for the first time. I don't think she was impressed like I was.

 Now Sadie is napping.:) Seems like it's the only time I have to get any painting done. Ha ha..but she is so much fun.except.. Anybody have any tips on how to get her to stop biting?? She's a sweetheart but thinks I"m her ma or sister and when she plays she chomps down on my hand.. yowl. As you know I'm a softy about hard discipline,so what am I to do... please-- advise would be great!

 love to you,Diana 
We've been having rain.. and it's chilly too.. I'm hoping for sunshine soon!