Wiktionary
catless
a. Without a cat or cats.
Usage examples of "catless".
No sooner had he left the court in the direction of the street -- for he had no desire to go back to his flat which though catless still stank of cats -- than the compressed garbage began to expand, raised the sack, and with it the lid of the garbage can.
Otherwise nothing of note, though all birds are vastly increased in numbers, after the mild winters, and in these relatively catless days.
As for you, as a catless catlover you will find that a stray turns up outside your new door within days.