I also have the X pens as they are great to use.
I buy different toys often so they do not get bored with the old ones.
Find new and interesting ways to do different things with them as they love new adventures.
Make sure they are not left alone to get into something that can hurt them. Take them in the beginning on short car rides to get them use to it so that they do not get nervous or sick while traveling.
Always always always keep them up on their shots.
Brush your fur babies teeth with a baby tooth brush and pet toothpaste, start this while they are small to get them use to it.
Enough from me I will let someone else jump in...As everyone has ideas.
