Poor Dori! I had an incident a month or so ago where Noodles' collar didn't open either. I noticed that the one she had was hard to break open with my own hands. So I went to see if there was something better. I tried a differnet kind of break away collar and I pulled on all the clasps till I found one that opens pretty easy. It's been good so far!
I tried the breakaway collar for my boys.. and Orion got his stuck around his mouth too. I didn't know right away.. but when I ehard the bell jinlging nonstop I went to see if he was alright.. and he was bleeding in his bmouth from trying to pull it out with his claw.. poor boy.