Thanks. When submitting, I realised that it could be a potential duplicate of other queries. I looked up multiple searches relating to cats and dogs with sitting issues, but could not find anything specifically relating to version 1.7.10, which is where I believe the issue may be. Again, thanks.
Facing a similar issue when running around with a map (on both creative and survival) to fill it in - game crashes when a new section of the map loads.