Hi there Kira & welcome to the KittyCatS Family!
KittyCatS going past range: sometimes this can happen due to a few reasons, usually when kittens have this issue it is due to them falling / pushing through prims. The easiest fix is to place down 0.5 - 1.0 meter thick prims under the floor / around walls to help keep the kitties from going through mesh/prims. Sometimes once they are full grown the issue stops, though sometimes due to physics even adult kitties can make it through mesh objects/thin prims.
Full grown: KittyCatS are full grown when they reach 7 days old. At 7 days old they will also begin to start gaining love!
Breeding: Once the cats are 7 days old they will gain love over the next 7 - 10 days till they reach 100% love. Once at 100% love they will be able to breed as long as both cats have all the right stats at the same time : They will need 100% love with 2 hearts each to breed. To gain 2 hearts they will need 100 love, 75+ happiness, 25+ energy (and awake) & hunger under 25%.
Food: Once the starter food runs out you can get normal bowls of kibble at our store in world. Each bowl will last 1 cat with breed on for 28 days (2 cats with breed on for 14 days). Here is a Slurl to where the kibble is located (note milk is 100% optional, it helps the cats gain love a little faster, they will reach 100% love in 7 days instead of 10 days without. 30 minutes of cuddles a day will also do the same as milk use):
http://maps.secondlife.com/secondlife/Ki...S/138/7/25
We have a great online manual full of information as well, here is the section that goes over breeding basics to help you with any further breeding questions you might have:
https://kittycats.ws/manual/article.php?id=60&oid=17
Also, here is our getting started page full of great info as well:
https://kittycats.ws/manual/article.php?id=190&oid=50
We have an inworld group as well that is full of users & staff that are happy to help with any questions or just share in the joys of KittyCatS ownership: secondlife:///app/group/277f5464-f119-e489-4517-ad3d0dd63cc8/about
If you have any issues or questions, feel free to ask in our group chat, contact one of our CSRs, or file a support ticket & we will be happy to assist and answer any questions you have!
My IMs are also always open!
Happy breeding!
-FoxieCat