I have just adopted a rescue Chihuahua, Chloe. She is our first Chi and a total LOVE. I've been searching threads, but still have a few specific questions I was hoping some more seasoned owners could shed some light on for me. She came with a 4lb bag of Science Diet from the rescue. I was thinking of switching over to a grain free food. I see that Wellness has a new small breed formula with glucosamine and chondroitin. That may be good because she has luxating patellas in both hind legs. (which do not currently bother her). I really want to be diligent that she doesn't become overweight, especially because of her knees. She has some plaque on her teeth so I was hoping to stay on dry kibble. She is a year and a half and 6lbs. So, anyway, sorry for rambling. I was curious to know what your thoughts are on foods, and also how often you chihuahuas go out to pee and poo. Will they have more stools on grain free? Also, do your chi's chase birds and squirrels? I'm afraid I may not be able to have her off the leash due to this, as she could easily slip under our fence. lol! Tough girl! Thank you in advance for any info!