No.
Do not do this.
Me being
lazy and my cat being dirty, I decided to give this a go. After the third
flush I opened the lid to see if my
cat was
clean, only to find that she wasn't there. After
panicking for a while, I looked again and she still wasn't there. I opened the
sewage pipes outside to see if she was stuck, but no. Later that day I put in a call to
Werribee Sewage Farm ("
Fresh sewage 'cause we grow our own") and yes, they had filtered out a very irate cat of the same dimensions and colour as the one I described. I explained to them that, no, the cat wasn't an
unwanted Christmas gift and, yes, I did want her back. If anything, she was even dirtier than when I put her through the cleaning process.
Remember:
Flushing the toilet is to get rid of things. Don't put things you want to keep in the
toilet bowl.