It’s not easy to costume a cat. Particularly when the cat is a 20-pound male Norwegian Forest Cat named Alex, who’s very conscious of his dignity, and the costume is a tasteful silk dress and a rope of pearls.

Clearly, Alex is not yet comfortable in his Pet Masquerade attire.

Getting him used to his finery is likely to be a lengthy process involving hisses, claws and curses (both human and feline), but I’m determined to prevail. And I’m not alone in this odd purr-suit.

All over the Florida Keys, otherwise sane people are constructing costumes for their cats, dogs, ferrets, potbellied pigs, ducks and heaven knows what other domestic species. The people are absolutely serious about this enterprise, though most of the animals are as uneasy as Alex.

What’s behind this strange phenomenon? A costume competition for critters, known as the WKEYZ Pet Masquerade and Parade, which is a highlight of Key West’s 10-day Fantasy Fest masking and costuming celebration that’s held each October.

The animal antics take place on an oceanfront stage at Key West’s historic Casa Marina Resort & Beach Club. And believe me, the fur really flies when several dozen costumed pets and their people strut their stuff in front of a few thousand enthusiastic spectators.

Past Pet Masquerade entries have ranged from the simple to the extraordinarily intricate ... like this one involving a very patient dog. (Photo by Andy Newman/Florida Keys News Bureau)

Entries usually range from simple pet-and-person duos to multi-member animal-and-human ensembles attempting to perform musical numbers. A panel of bemused judges awards prizes in categories including most exotic attire and pet-owner look-alikes.

Among the more bizarre past entries have been a flock of giant “chicken people” who cavorted onstage with a dog named Weasel to the strains of the “Super Chicken” cartoon theme song, a duck lounging in a bathtub on wheels, a team of miniature dachshunds pulling a miniature covered wagon, a parakeet riding in a tiny remote-controlled car, and a musical salute to Alfred Hitchcock’s “The Birds” featuring a blonde-wigged Borzoi hound costumed as “Birds” actress Tippi Hedren.

The Borzoi was a regular Pet Masquerade contender whose human companion, Madeleine Burnside, delighted in staging complex song-and-dance routines featuring the dog and a multi-person entourage.

One year, Key West mortgage banker David Koontz was a member of that entourage. For reasons known only to Madeleine, the costume she chose for him included a large cutlass and purple body paint applied liberally to his skin and hair.

Kelsey Morris and her duck Prissy shared "top billing" in a past Pet Masquerade. (Photo by Andy Newman/Florida Keys News Bureau)

Unfortunately, she neglected to tell him the body paint didn’t wash off very well. The day after Pet Masquerade, David flew to New York City to attend a high-level national mortgage bankers’ conference — where he spent most of his time explaining why his skin and hair had a distinct purple hue.

With 2009’s Pet Masquerade set for Oct. 28, Florida Keys pet lovers are stitching sequins and feathers onto costumes, reluctant animals are fleeing from fittings, and David Koontz is avoiding both body paint and Borzois.

As for me, I’m still trying to convince Alex the Norwegian Forest Cat that he looks terrific in a silk dress and pearls.