New to Group

I am not sure I ever figured out the difference in discussions and comments. I posted both, but clarification would be appreciated.

Here are my girls, who happen to be my favorite models.  All Chihuahuas, Gypsy is 8 years old, 10 lbs. The one in the pink "Desparate Housedogs" t shirt is Izzy (Isabella, but Izzy for short) and she is a 4 year old rescue, adopted about 5 mos. ago.  Lastly, Lucy, 1 year-old, a.k.a. "the white tornado" and "Lucy Fur" (when she is really bad!!)

Animals are my favorite hobby to photograph. Professionally I do mostly stuff for online catalogs, animal/pet photography has so far been just a hobby - something I can do for fun instead of work. I am certainly not professional with it so would appreciate learning tips and getting criticisms/advice.