for birthdays and adoption anniversaries i get their favorite flavor of wet food for one meal. they get treats. and sometimes new toys, but not always. lately all of the toys they like best i have to mail order or buy on trips to visit family.
I sort-of arbitrarily decided Zissou's birthday is August 18th, based on how old the vet said she was when I found her.
She gets turkey lunch meat (couple times a year, don't worry) on Christmas and her birthday. It is her absolute favorite thing on earth. Some treats, new toys, etc.
For her first birthday, she got her windowsill bed, which she sleeps in every night. For the past christmas she got a new cat tree and a drinking fountain. I don't know what she's getting for her second birthday!
My girls all get crunchies (a bowl of dry cat food) and usually some fresh catnip from the garden on their birthday. Cleo has renal failure, so none of the girls get dry food...they all eat wet....so a whole bowl of dry food is a real treat! They constantly get new toys, so that's no biggie. The summer before last, I had my back porch made into a three season room. They got a floor-to-ceiling cat tree for their birthday that year (we all celebrate our birthdays in May.)
I like to give my girls a good yummy dinner and lots of treats! For their first birthday I even stuck some treats in the top of their can food like candles! They didn't quite get it, but they ate em!
I give my little guy extra helpings of Wet food with his favorite treats on top and drizzled in tuna juice he LOVES it and won't stop eating till it's all gone
I don't do anything for thier birthdays. All my kitties were strays, so I have no idea when they were born. I spoil them on a regular basis to make up for not knowing thier birthdays though
I have a home made cat treat kit and I make them that. I also saw a humaine society store at a mall and am thinking of ordering a cake treat sorta thing for Murphy's first birthday on April 1