Um i dont see why that would be a problem if you only wanted the bags. But i can assure to you that the flee collar will not kill a small dog! I have 2 small dogs a chihuahua and a min pin and they get new ones every 6 months and i havent had one problem yet!
We had one on her when we went to the vet and he cut it off and said it's got some really long name that will kill your small dog, and gave us and everyone in the waiting room a big lecture about not using them. He showed us stories on the internet of people that lost thier dogs due to those flea collars. It was scary. I have to drive to another vet 30 miles away to get trifexis for her now.