This actually works very well. Most summoners wouldn't know what to do if their cat is put to sleep. As a summoner myself, I have found that staying behind my sleeping cat so the enemy can't get to me is the best choice until my cat wakes up.
What people do not understand about summoners, is that they are very easy to counter. Playing well as a summoner in PvP requires tremendous player skill, it is so rare to see a summoner make it to any kind of top league PvP tourny because they are NOT an easy class to master.
The ones who lose to a summoner in PvP need to realize how easy it is to shut them down in the first place. They'll make it further in the ranks than I ever will xD