Well, I don't know about Puerto Rico, but I went on a trip for three
weeks and left my one cat at my apartment but I had a friend come and stay
here.  She had to leave to go out of town for my last 4 days so I had it set
up so she could take her to my vet's office.  They do boarding services
there.  My vet has someone come in and play with the boarded animals and has
large cage areas for them with beds and litter boxes in there.  They also
let them out to roam in the office during the day.  I'd check to see if your
vet has something like that.  I wouldn't want to board mine with a kennel,
but I trust my vet and have seen how they interact with the boarded animals.
Otherwise, get a person to come stay with them for at least every other
night if you can.  Cats are better with being alone than say dogs, but for
such a long absence, I know they'd like to have company for a whole night
every day or two.  When my friend was here for all but four days, my cat
started sleeping with her and everything.  When I got home, she was glued to
me for weeks.  They're going to miss you and they need some consistent
interaction.  For things like weekend trips, they're fine.  But that's a
long time to be gone.

Beth

<snip>
you should get a "house sitter"
that's what we did when we recently took a one week vaction...
all was fine and our cat was very calm and happy when we returned

Hi Jessica

I have left my cats alone for as long as two weeks

I wasn't happy about it and fretted constantly but they are happier in their
home alone than in a kennel

Get someone to check on them and to freshen up their water........I leave a
big bag of crunchies in the middle of the floor and rip a tiny hole in
it......gives them something to do to combat bordem

I let mine come and go with the pet door and they seem quite content

Once again, get a friend just to pop in and check on them, that way you can
phone your friend and get an update once in a while.

If you can afford a small vacation why not offer your neighbor a couple of
dollars.........it is cheaper than a kennel!

Gracie