I always go into them and never had problems with it unless it was an isolated one.
WoW that's good. I'm jealous. Each time I tried to chain at the Trophy Garden my chain breaks at 10. sob...
I always chain at Lake Acuity for Snorunts and it works just fine. Since I was eager to get a Snorunt I tried getting one at 20. Yeah I know it may not work. In the end I somehow got up to 37 Chains in which I managed to find a Shiny one in the end. I only go into the patched in which I deemed safe. At that time I didn't know that 4,0 patches were dangerous. Guess I was lucky. As soon as I caught and saved it I went all out risking myself to get to the 40th chain.
I finally did. It might be luck because when I tried to catch a Duskull or Chansey my chain always breaks at the 30s.
Is it ok to chain a shiny at around 30?
What are the chances of finding one?