It's good to clean the kitty litter box once or twice a day. Once a month is good to discard the kitty litter, even if it is the clumping kind. Disenfect with bleach and water prior to refilling the kitty litter box with fresh litter. The clay kitty litter has to be changed every 5 days and the kitty litter box disenfected with bleach and water prior to being refilled. To weight your pet, weight yourself first and write down your weight in a piece of paper, then, pick your pet up in your arms and step on the scale, look at the body weight now, then substract what your weighted originally from what you weight with your pet in your arms, the difference is your pet's body weight.
Dental care is very important.
You can purchase kits that come with tooth paste that is formulated for cats. The kit consists of a tooth brush and tooth paste. You can purchase these kits at pets stores. Dip the brush in the oxigenated water and brush with this. Brush from the end of the gum to the tip of the tooth.